Would I just be able to use the alsa's xmms plugin device selection to point to the right device for at least xmms?
mkdir 2.6.21-omap1 cd 2.6.21-omap1 tar zxvf /home/user/MyDocs/.documents/modules-2.2007.50-2-custom.tar.gz sudo gainroot
insmod sound/core/snd-page-alloc.ko ... insmod sound/usb/whatever.ko