Sprint 700wx and bluetooth DUN for WinXP?

[twobaul]

I can tether my sprint 700wx to my lap top (winXP) using the usb cable at will w/o conflict w/o extra charges :0), however I recently purchased a bluetooth module for my lap top and I would like to connect to the internet on my lap top from my phone using the bluetooth instead of the usb cable, I have A2DP saved on my SD card but not yet installed, Do I need to install this file to my device or can I install it to the SD card? Do I need any other utility besides A2DP ? What settings do I change on my lap top as far as internet connections goes? Thanks in advance for any advice.