Ok i placed an actor somewhere in the world and i totally forgot where... question is, how do i search for him if i dont remember where i place him? any shortcut for this?

Search for the actor in the Object Window, rightclick -> Use Info. Now it should display every use of this actor. Under "Used in these Cells" you should find the cell.

Oh my god thats so awsome! i was having a nightmare just trying to find that actor... THANKS A LOT!