I tried you mod and, I must say, that it is fantastic! Having more populated mobs makes the game much more fun and interesting to play. I tried your script with Ice & Blood with the latest CM patch and it works perfectly, though I had to reduce the spawns from 4X to 2X as there were just to many creatures. It's not that it was too difficult, it was just impeding my progress. At the bottom of your page you asked for suggestions and feedback.
A few suggestion to make it even better...
1. Checkbox to remove Rats & Bats
2. Checkbox to remove Undead Resurrection
3. Checkbox to add more Elite Creatures
I know this game is a bit old now but I just installed the Gold Edition from this forum and I've loving Sacred like it was a new game!