Gaming i need to be able to host games on my computer, but i dont know hwo to get there to chang it so its the same as my ip address, whats the site online i need to go to

If all you need is your IP address, you can go here and it will tell you what's your IP.

you can do that nicholas...all that you need to do is to disable the DHCP in the belkin router...this makes your router into a switch...so that your computer will get a global address...but the problem is that you cannot access online simultaneously from two computers(which you are doing now) connected to the router...also you wont be able to access local computers, as one of the computer will get global address from ISP and the other computers connected to the router will get ip address in the range of 169.254.X.X...if you disconnect from the internet, the next computer in the network would be able to go online....

Every device connected to the public internet is assigned a unique number known as an internet protocol (IP) address. IP addresses consist of four numbers separated by periods(also called a 'dotted-quad') and look something like 127.0.0.1 

since these numbers are usually assigned to internet service providers with region based blocks, an IP address can often be used to identify the region or country from which a computer is connecting to the internet. an IP adress can sometimes be used to show the users general location because the numbers may be tedious to deal with, an IP adress may also be assigned to a host name, which is sometimes easier to remember hostnames may be looked up to find IP adresses,and vice-versa. at one time ISPs issued one IP adress to each user. These are called static IP addresses. beacuse there is a limited number of IP adresses and with increased usage of the internet ISPs now issue IP adresses in a dynamic fashion out of a pool of IP addresses (using DHCP). these are referred to as dynamic IP addresses. This also limits the ability of the user to host websites mail servers, ftp servers, etc. in addition to users connecting to the internet with virtual hosting,a single machine can act like multiple machines (with multiple domain names and IP addresses).

Configuring Your Dell™ TrueMobile™ 2300 Router for Gaming

Follow below steps to set up the router for gaming:

1. Select the system or systems to be used as game systems.
   
2. Locate the MAC address. For Windows 2000 and XP
   
   1. Click Start -> Run.
   2. Type cmd, and click OK.
   3. On the command prompt, type ipconfig /all
   4. Write down the MAC (Physical) address of your computer to configure for gaming.
      
3. Open the web browser, and type http://my.router (or http://192.168.2.1)
   
4. Click the Advanced Settings tab.
   
5. Click the DHCP Server Settings tab on the left navigation bar.
   
6. Click Add button in IP Address Reservation,
   1. Enter the MAC address of the system you wish to use for gaming in MAC Address field.
   2. Enter an IP address for the system (select a number between 101 and 254)
      
7. Click Submit.
   
8. Click the Port Forwarding Settings tab on the left navigation bar.
   1. To set a single computer for gaming, check the Enable DMZ Host box.
   2. Enter the IP address of the system at DMZ IP Address field.
   3. Click Submit.
      NOTE: Only a single computer can be set for DMZ service. To set multiple computers for gaming, please post your query again
      
9. Reboot the client system. The client system will use the newly assigned IP and will not have any TCP/IP ports blocked by the firewall feature of the router.

You need to look for something on your router called Static NAT and configure it to point to your internal IP address.  You also need to find out what ports your NASCAR game advertises itself on...it's usually high ports (20000-30000).  ONce you find out the port(s), you can create a custom service on your router for those ports, and when you configure Static NAT, it should ask what 'service' you want to advertise.  This basically tells the router to forward all inbound traffic, looking for those particular ports, directly to your IP address, which will allow users on the Internet to see your game server. 
Cheers!

Make sure your private IP address is statically set.  Your public IP address is obtained from your ISP and is what other users will be connecting to.  You can not manipulate your public IP address so if your ISP is running DHCP, it is very possible that your public address is changing.  Also if you are frequently disconnecting your modem, it is possible your ISP is leasing you a new public IP address each time.  So try to keep things as static as possible.  As far as the battle net stuff.

Diablo, Warcraft II Battle.net Edition, and StarCraft: 
Allow port 6112-6119 TCP and UDP out and in
Diablo II: 
Allow port 6112 TCP out and allow established sessions in 
Allow port 4000 TCP out (realm games) 
Allow port 4000 TCP out and in (hosting open games only) 
Warcraft III: 
Allow port 6112 TCP out and allow established sessions in 
Allow port 6112 TCP in (hosting custom games) 
Allow port 6113-6119 TCP out and in (hosting custom games if you've changed the default port in the Options/Gameplay screen) 
If you are still having problems after you open up the required ports, try opening 116(TCP) and 118(TCP). I don't really know if these ports are required or not. 
I have had people tell me that opening up those two ports have helped them connect to battle.net.


Hope that helps.  For manipulating ports in your router I suggest consulting your user manual, or online FAQ.  Save your router config before applying any changes, and always remember, opening up ports subjects you to different types of security threats so be aware that is a risk you are taking.

You need to configure the modem for it to allow game hosting. Enable NAT/GAMING setting of your modem. You can do so by pulling its interface and configure the settings from there. The interface of the modem can be pulled up by typing the default gateway of the modem in the address bar of a browser.

Hope that helps. Enjoy your game sessions!

I am assuming here with the way you have it set up your getting an internet connection.
what you saying i understsand mostly so i'll see if i can help you
first of all you have speedstreem modem that connects to you isp, this is assign your internet address from the isp if you paid for a static IP it would be in here, if not it's assiged by a dhcp from your isp company so if you if turn it off or have a power loss for anymore than 5-15min your ip changes.
now your modem then connects into your belkin router this as well as your modem it's prob set up as dhcp so it wants to issue each computer with an internal address of 192.168.0.X the reason for this is so it knows where to send the incomming information to what computer.
no matter what computer your using the address that goes over the internet will be the one assigned to modem from internet provider so if this need to be static IP to run your game server you will have contact your internet provider for an address.
but you may be confussing the issue a little, my suggestion to you would be:
1. go to your connections on each computer
2. right click on the lan connection choose properties
3. go to internet protocol (TCP/IP) then click properties
4. then click on obtain ip automatically and obtain dns automatically
this will remove the static windows address you may have put in.
try this and see if you can get you game or game server will work.
btw you may have to reboot your computers after this to get be sure to get the new address.

First you must make sure that the Ip address 192.168.2.1 is your routers ip address.

Click on Start, Run, type cmd, then click OK. Type ipconfig /all and hit the enter key. You are looking for the Default Gateway address. Use that address in your web browser. When you set up your static Ip address on your computer, use the first three numbers of your default gateway's address, then for the fourth number, add one. For example. If your default gateway address is 192.168.2.1, then your static ip address should be 192.168.2.2.

Try this and let me know what happens.

You need to set the correct address for DMZ (your PC IP address). You may also find that your PC firewall settings will need changing.

You shouldn't need to set DMZ for this, you can set port-forwarding instead, and then select the ports you wish to pass through for each IP address connected to your home side of the router.