Thanks a bunch ^^
So next troublesome question is, can i get it to take my target if my mouse is not hovering any target?
like the macro goes like
/cast [target=mouseover, exists] heal
So that if my mouse doesn't hover any, it just does a normal heal on my target, and if no target, on myself.
(btw, couldn't get it to work with shift-unit, however with just unit it works fine, although i dont need to press shift to make it take mouseover)