Not sure I understand what you want, I assume you want to move a chroot to a normal partition?
Create the destination partition ( mkfs.ext2,mkfs.reiserfs,..)
Copy the chroot to the destination partition using dd
Check the system for coherency (e2fsk,..)
Resize the partition (resize2fs -p,resize_reiserfs,..)
Recheck the system for coherency (e2fsck)
Be sure to keep the chroot in case you have to retry.
Should work