May I suggest that since no one has had a problem using native WinXP SP2 Bluetooth support that you allow XP to find and install the module.
Once that’s done, go Control Panel, Bluetooth Devices. ADD and pair your phone.
Once the phone is paired. Goto CP, BD and highlight the phone, click Properties, Tab Services and tick the boxes for the available services, one of which will be the modem.
XP will then assign a virtual Com port to a new device labeled “Standard Modem over Bluetooth Link.”
That modem is available to to the New Connection Wizard for Dial-up network configuration.
If you wish, you can install the Bluespace Wireless Switch utility.
As far as I know Bluespace offers nothing that XP SP2 doesn’t and XP adds BT network support. (for what that may be worth)