I used to do this with my verizon v3m razr.. I dont' know about gprs, but I know with verizon unless you pay for the broadband package you get 14.4K connection, I never used it to do anything with browsing, AIM and Yahoo messenger only. Even going to google was like a 20 second wait...aweful. Totally not worth it in my opinion.... I can't realy help you set it up though I know with motorola you can use the mobile phone tools but once again that's only going to give you a very slow connection. Plus it depends on what type of service you get in your area. with verizon I had digital but I never got evdo becuase we don't have that here. so I only had the 14.4 if you have the broadband network in your area you MIGHT be able to get high speeds, I don't know, but good luck with it..
Jay