Is there a simple way to install apps to either the internal or removable memory cards on an N810?

I have read through some posts on the forums and seen procedures for installing the OS onto the internal card, but am a bit scared of doing this as i havnt had it very long lol

Is there a simpler method? If not, if i have problems with the clone to memory card can it be reversed by re-flashing the device? Will i get stuck with a boot load menu?