<I>personally, I would like to edit units and create SP scenarios.</I>
I remember a long time ago, maybe it was about eight or nine years ago, that someone asked for the ability to edit units, or had released a unit editor, and the Major said something like, "You might see some weird things, things like UAVs with Hellfire missiles on them."
Hahahahahaha!
Anyway, I remember doing exactly that. It must have been some kind of homebrewed editor, maybe it just affected the UAV. I think this was back in the AOL days.