I also tried out WHDLoad latest verison of Super Stardust AGA and all played fine on my TF1260 without changing any ToolTypes etc...just loaded it up pressed icon and all went well and exited to Workbench with no issues.
I don't have beta firmware on my TF1260, full 060 Rev.1 running OS3.2, my A1200 MB is v1.1.
Also, I also was only able to play for approx 10 minutes as I'm recovering from leg surgery and sitting down in a regular chair isn't possible for me for longer periods of time unfortunately right now. Still was fun to play again with my miggies even for a short while.