http://opendingoo.com/wiki/index.php/Di ... llation.29
You'll want to edit /etc/inittab so that you don't have to use a keyboard to login.
You can put binaries in the /home directory in your rootfs. You'll have to mount the rootfs as read/write. I'm still not sure how to mount the FAT partition.
Also, I think by a mistake I made in editing my /etc/inittab file in the rootfs, I'm able to edit bash history, allowing me to scroll through prewritten commands, which help me to run whatever programs I want without having to use my computer (I was trying to follow ainu's instructions, but either he made a typo, or I did which caused this, but either way the same end result is reached). I would access the file, but my linux PC is giving me grief, so I can reach the file.