I spoke too soon in the previous post ...

Are you able to see everything that you expect when you are root? If so then the problem is filesystem permissions in the RH filesystem.

Rather than always running as root under KNOPPIX or chmod'ing your entire RH filesystem so that user knoppix can read and write to it, add a new user and group that corresponds the RH user and group. That is, a user under KNOPPIX with the same user id as the RH user and a group under KNOPPIX with the same group id as the RH group.

Then just su to that new user and you should be able to access the RH user's home directory.

Cheers
Dan