No need to re-invent the wheel (and possibly get Google looking at you too closely...)- it seems that Archos set it up so that the '/system/app' directory has aliases to the '/data/test/froyo/system' folder which is unprotected, allowing the core Google apps to work seamlessly there. There's more about it here:
http://forum.xda-developers.com/showthread.php?p=9706410#post9706410It would be wonderful to get that working, as it would allow me to test apps that use the calendar, etc. Without that functionality, YouWave isn't of much use to me.