It is possible to configure the 7650 as a modem but using it with PC could be quite difficult since the only ways to connect the phone to a PC are Bluetooth and IR. You would need applications that could handle the BT/IrDA to/from GPRS socket on the phone, and also some kind of BT/IrDA application on the PC side.
I would like to know if it is possible to use Nokia 7650 as a GPRS modem for the PC? If it is possible how to configure the phone to be handled as a GPRS modem?