Move base to absolute coordinates?

Hi again, I'm playing around with `actionlib` and `smach` trying to make my robot move to four specific absolute points on the map. I'm using MoveBaseGoal to drive the robot, however, it seems to accept only cordinates (i.e. the target pose) relative to the current pose (`/base_link` frame). How do I make my robot move to an absolute point on the map (relative to the `/map` frame that is) without having to translate it from `/map` to `/base_link` everytime? Thank you! Cheers, Hendrik