Bill, ALK sells two different bundles with two different USB GPS receivers. One comes with a Philips made USB GPS receiver, which is I believe a "software GPS receiver" (compatible only with ALK CoPilot, but less expensive), and the other is made by company GlobalSat, model BU-353.
None of the above would work with a 64 bit Vista, but since you run the 32 bit version, you should be OK. Let us know which unit you have.