Have you follow this forum before buying your stuff?? I dont think you did. If you want something that works with no hassle, get Copilot2003 GPS receiver/software combo. It is by far the best PC GPS setup around for th US users. So far there're 4 minor complaints people have with it. inability to change the robotic voice, very few GPS receiver works with it, no SDK, sometimes it takes forever to get a lock.
SDK, no big deal unless you're a programmer and want to do custom software. The only other receiver that works with Copilot is Rand Mcnally GPS receiver. You can change from a male speaker to a female speaker but both are robotic. Copilot receiver and Rand Mcnally receiver require a clear view to the sky otherwise it wont lock to all 12 satallites. You'll get the yellow status instead of the green status. It is expensive at $400 a pop but look at it this way, you have already spent about 150 and you're still not happy with it.