how to lock nautilus file browser

Hi Everybody..

I am using Moblin V2 which has nautilus file manager the one which is also used in Ubuntu.
I want to lock the access to file system such that i can only browse my home folder not other locations like /, /usr, /bin and all.

Or i want to create a partition of 10 or 15 GB so that i can only browse this partition not other folders of filesystem.

Thanks Guys.. waiting here for ur response..
Lokesh Singla

duplicate post of http://www.unix.com/unix-dummies-questions-answers/122307-how-lock-file-system-access.html\#post302365874 ..

should be closed !