I've got two versions of that rom, and I get the "maped space" error on both, so it must be something with pj64, because it works with nemu, but crashes every 5 minutes.
What can I do?
Goto http://www.smiff.clara.net
Download _ALL_ files concerning GoodN64. GoodWindows and another file that contains the zlib.dll. Extract that file to the same directory as GoodN64. That should do it.