I have a little problems with dmc2 object. I cannot find enywhere where I can put dmc2 object to MMFs Objects toolbar... and to second problem... I dunno how to make background move slower than "foreground"(is that the right word?). Like in those old snes or sega genesis/megadrive games (was it in donkey konk, well it was in sonic the hedgehog). don't complain if you don't understand what I mean because my english sucks.
I don't think you can put extensions on the toolbar. And for your background thingy, it sounds like you are reffering to parallaxing. There a pleny of examples around and a few posts on this board about it, I think.