My muvo^2 is a 4GB one; however, to mount it:

0- boot knoppix 3.4 with kernel 2.6 (type knoppix26 at boot)
1- become root (type su)
2- choose (or create) a directory where to mount it; e.g. /mnt/muvo
3- type mount /dev/sdb /mnt/muvo: it should work.

Actually, there is a critical point: on my linux box I have muvo on /dev/sdb but on yours this may be different. Try using QTparted (included in knoppix 3.4) to see what's the right device name to use.

I have a question, also. I cannot make kernel 2.6.3 recognise muvo at boot, so it's no use storing configs.tbz on it; has anybody worked this out?