I could say the same for mapscreen in general. As I mentioned to Gleeok recently, the entire way that we do maps is a bastard to change. It would be better, for a future version, to make a wholly new map system, and then we would be stuck with a big switch of:
if ( version >= 3 ) { DoNewStuff(); } else { PrayOldStuffWorks(); }
For the present, at the least, I added a whole bunch of stuff work working with maps in the script language to 2.54, 2.55, 2.60, 2.sheep. I ran into a fun time when i wanted to make save state functions, when the screens used NES DUngeon doors, because there was no way to remotely read, or set them.
If you want to look at how I did any of this, I have scripts posted both on ZC.com and Pure.
Scripted Lockblocks, Doors (ZC.com)
Scripted Chest Game, and Chests (ZC.com)