I Messed Up... Can ANYONE help?

I moved my Mac HD's private folder to the trash not knowing that it stores thousands of crucial UNIX folders (one of which that stores the admin password). I haven't yet trashed it, but I can't move it back to its original location because when I try to do that Leopard asks for the admin password but the password doesn't exist anymore because it's been moved to the trash. Is there anyway I can remove the private folder from the Trash and put it back? Maybe some kind of Terminal command?

Thanks!