There must be something hard coded for level 4 and 5. I can't make any substantial changes to level 4 and no changes at all to level 5 (whether I remove the skeletons in these levels or not) without the game crashing when loading these levels. So I will leave these levels alone. It's a good thing I didn't have any of them opened in Camoto while I saved my new levels or else level 4 and 5 would not have worked in my mod.
I can make changes to level 2 if I reduce the size of the level but I will wait with that until the skeleton issue may be solved.
Btw, over at Public Commander Keen Forum I saw a thread about Monster Bash and according to something I read there it seems Camoto can edit episode 2 (and possibly 3) too. But when I start a Monster Bash project in Camoto I find only episode 1 available, even if I have all episodes in the folder I let Camoto copy the files from.
All the same I am very content with having been able to make levels for episode 1, my favorite episode. Thanks again for the great game editor Camoto.
EDIT: I have found out how to make a new level 4. So my next level will be a level 4 replacement.
