New Map Helper?

the realm map hack (at least on flash) was a simple png of the fully cleared world stored inside the .swf file itself as an added asset. and some code that made it compatible so it can be loaded as data for "painting" ur ingame minimap.
you could theoretically load any other png, but the ones available in *******s with the red numbers are different sizes which could at best make the minimap slightly off and at worst crash it all. and i doubt 059 has the patience to redraw 13*70+ red points of interests onto the correct sized maps.

dunno if or how their exalt client is doing it.