Byron, the G-Track is a USB audio interface that also has a mic. In order to make it work, you have to first of all make sure that Vista recognizes it as both an input and output device. In fact, you should set it as the default audio device in your settings. Your headphones/speakers should be plugged into the G-Track.

Then, after you've confirmed that you can at least play sound out of it (use Media Player for example), then start up PTPA. You should see at least some kind of generic USB audio device in the listing for devices.

Set it up for both input and output.

Don't bother with ASIO4all unless you have to.

-Scott