+1000 to this. It does not IMO make sense to do all of this coding (and it is quite a large amount of coding to do this), and then junk that all a little while later when the actual Multi-Maps stuff comes along. It would also as you say have issues with world wrapping. All Mapscripts would need to be changed to accommodate this, and then changed back once Multi-Maps come. All in all I think that Hydro's idea may be more work than it is worth.