I'm still not certain what folder structure you're using y2kcpi1 - saying "everything in the .rockbox folder" doesn't actually tell me much.
I've installed my 80GB from linux - it's not tricky, just follow the instructions in the manual. If you feel the instructions in the manual as they stand are hard to follow - please outline which bits need clarification, and I'll try to help out.
For anyone who's having trouble, your ipod should look like this post Rockbox install :
Obviously the "/mount/point/for/ipod/" will be based on your own system's settings (mine is actually /mnt/ipod for example).
The .rockbox folder there should contain the rockbox.ipod file, and a bunch of other subdirectories :
If you folder structure DOESN'T look like this, then you've done the install wrong.