I have the lg pm-325 as well. You're right phonecontrol does not work with this. I can at least get it to dial, pickup, and talk handsfree. No callerid as of yet, but I'm working on it. Anywho, all you need is a bluetooth dongle(and software for it--probably widcomm drivers) and your phone. That's it.
Pair your phone and computer. You will not connect to any other bluetooth device unless it's paired.
For internet access, create a new network connection and use your phone as the modem(it should say bluetooth modem). For internet access the number is #777. You don't need a username or password. That's it!
P.S. Make ABSOLUTELY certain that you have a vision plan. It will cost you. Take note that this isn't supported by sprint.