I'v put XP on my pc and now I can't get my wireless broadband to work

yes

Not sure exactly what your hardware setup is, but I would reboot the broadband router, then reboot the wireless router. Everything should come up clean, but give it at least 5 min. To help connect after reboots, you can choose "repair" from the wireless icon in the system tray (XP?) or renew your IP address. Start --> Run... and type ipconfig /renew

Hope this helps!
If so, please leave a rating!

Unplugging the wireless router and connecting it again should not have altered the wireless connection/configuration. You have connected the cables correctly because the Internet works when you connect a LAN cable to the router.
The Linksys wireless configuration or the wireless card configuration in the computer was changed it to lose the wireless connection. The wireless card configuration needs to be changed to match the wireless router's settings or change the Linksys with new configuration settings and configure the wireless card accordingly.
To secure your router with a login password and wireless security, please follow my instructions - click on this link :-
http://www.fixya.com/support/r3559128-wireless_router_security
Should you need further assistance, please leave me a comment.

On Windows XP
>>right click wireless connection icon >>view available wireless network >>click on change advance settings inte left(SP2) orAdvance(SP1) >>on top click on tab wireless network >>clear preffered networks >>Click on ADD below preffered network box >>Put in the details for the titles mentioned below Association(Tab) >Network Name (SSID) : put in your wireless network name >Data Encryption should be check >Network Authentication(Shared mode) should be unchecked >The key is provideded for me automatically uncheck it >put the network key and confirm it Authentication(Tab) >check Enable IEEE 802.1x >now uncheck Authenticate as Computer when computer info is available >now uncheck Authenticate as as guest when user or Computer when computer info is unavailable >uncheck Enable IEEE 802.1x >>click OK now it will start working enjoy

install the driver of your broadband card in your laptop before using it.

First, try adding a wireless card to the Xbox, run the wireless off of the router OR if you have multiple connections (broadband, should be an "In" port, and several "Out" ports) Try connecting your PC and you Xbox through the "Out" ports, with the cable modem cord hooked into the "In" port...

In addition to a wireless router you will need a wireless reciever for each PC you wish to have working simultaneously (assuming the PC does not already have a wireless networking capability) .

The wireless receiver is usually a USB or laptop PC slot device which you plug in to the PC and after installation of the necessary software (usually supplied with the device) you can surf wirelessly. The USB type wireless devices are about GB£20 to buy .

To connect more than one computer to same network, you need to use a router. Two modems will not work on same network.
My suggestion:
Buy a wireless modem router for cable broadband (and eventually a wireless network card for the other computer.
Here is an example: Linksys BEFW11S4 Wireless-B 4-Port Cable/DSL
Ask retailer to get right model for your broadband.
Connect the remote computer with wireless.

Windows XP has a built in wifi configuration tool, previous versions of windows dont have this feature. But if you were to buy a wireless card it comes with software for wireless to work on all versions of windows from 98 - XP most if not all new laptops have wifi built in & that will be able to share your broadband connection through the netgear router. You can configure the laptop & pc to share files & printer between each other, easy way of doing that is by using the wireless network setup wizard which can be found in Start -> All Prograns -> Accessories -> Communications -> Wireless Network Setup Wizard.

i think it is because 98se is not compatible with broadband or wireless, you know what i mean, if i were you i would upgrade that OS to xp, very cheap these days

hope this helps