I did a little digging (actually googling) and found the solution to the nagging px.dll problem that WinAmp pops up every time you run it. 

http://forums.winamp.com/showthread.php?s=946663fd0535e647d7ff2814a9ed8d65&postid=2119645

Unfortunately, I couldn't locate that pesky px.dll file on my system, so I fired up an XP VM in VPC07 and installed the latest Winamp there, copied it from my VM to the desktop, then copied it into the correct system folder.  Vista/VPC wouldn't let me go directly into the folder due to the UAC.