Firstly Lyn, to use your cell phone as a modem and get internet anywhere, even in antartica :P,
You're going to need 3 things;
your laptop (preferably running windows)
your cell phone (which you need to make sure connects to the internet on its own)
And a cellphone usb adaptor set, which you can buy from places like bestbuy (however they do tend to be expensive) If your phone is infrared or has bluetooth it would make the process easier, but most don't.
First, plug the phone into your computer using an USB data cable. Make sure the cable you pick up fits your phone. If you're not sure, do a quick search for the cable that fits your phone model on http://www.cellularfactory.com/data_cable.jsp
Windows will know you just plugged in something new and wants to know what it is, so the Add New Hardware wizard appears, eager to get the question settled. If you're lucky, your phone came with a handy CD that contains your drivers. If you weren't so lucky, Google search the drivers for your particular phone model, install them, and then point the Wizard in the driver's direction on the hard drive (so if the drivers are on the desktop, you'll just click browse in the wizard and go to where they are on the desktop). Once Windows says, "Tada I can use your Nokia CDMA modem," you're practically there. You might even be in luck because sometimes windows or even linux will just magically know that it is supposed to be a modem (with the right cable of course.)
Next you'll need connection software provided by your carrier. Again this might be on that CD that you may or may not have or get with your cable package, or you can download it from your plan's web site (Google Nokia to find them) Once you have that software, your baby is hot and ready for some internet action! Of course, depending on your location, plan and service, your speed will vary, usually this method of getting internet is typically more expensive and slower than typical home DSL and wi-fi.
I hope this helped, stay spicy and happy lappying!