Question about Attaching Mcs

I was wondering when you attach a mc is it possible to make it so it can attached onto the root but at the same position as another mc, but still be on the root by itself. I seen a script like it before something like, _root.mc.pos, im sure that wrong but soemthing like that. Also how do u make it so that multiple copies can be attached at a new time, giving it a new name each time like new2,new3,new4. Sry it is sounds confusing, i suck at explaining, thx for the help

_root.attachMovie(“hatmissle”, “new1”+i, i, {_x: xPos, _y:yPos});