Hey! I found the info for ya Here's the link and hopefully you can get it working..
http://helpdeskgeek.com/how-to/setup...t-from-you-pc/
On my Sprint BB Curve, For example: My BB Curve 8330 connect to laptop using SprintSpeed software that I had to manually download from Sprint. It was not included in BB Curve CDrom that came with my BB.. I can use Bluetooth on my BB to pair it with my laptop's Bluetooth USB dongle and it connects as a modem!. It works nicely and don't need to use USB cable.
I googled search and there is another way to setup PAM, Here it is, scroll it halfway down and you should see "Tmobile's Phone as Modem plan" and software from Microsoft free download is called "ActiveSync" so I don't know if it's any good or not. Tmobile been quiet about it. Interesting!!
Here it is ..
Use Your Cell Phone as a Modem for Your PC
Good luck
Catty