I'm guessing, since you've not posted again, that you solved this problem? If not, the odsds are overwhelming that you don't have reisersfs support compiled into your kernel. If you used genkernel, you probably don't. Otherwise, the manual make menuconfig won't default to include reiser support. If you've installed to a single reiser partition, as opposed to Gentoo's suggested scheme using an ext2 /boot partition which isn't mounted by default, you'll want to compile reiserfs support directly into the kernel, NOT as a module. Good luck. And hey, if it doesn't work out, read my post on NavynOS. I guarantee you'll get a nice install from it.