if you want HTC audio manager as your default player change
HKLM\Software\HTC\Music Plug-In
“MusicPlayer” = 2 (default is 1 for WMP)
If you need more registry hacks visit the registry thread at
http://forum.ppcgeeks.com/showthread...=11156&page=48 and check my post...it has a zip with a compiled list of registry entries.
I believe only WMP and Audio manager are supported with HTC Home Plugin