I agree with horndoctor, use the stock WinMo 6.1 in airplane mode, and put a shortcut to the player of your friend's choice into the \Windows\StartUp folder. If the player can be set to Full Screen mode, then turning Vogue on will go straight to a full screen player - no phone stuff - not even any PPC or PDA stuff like top info bar or bottom softkeys. I use PocketPlayer in full screen with my custom skin:
Edit - I also recommend AE Buttons for making the send and end keys do player functions instead of phone stuff.