With rockets and bombs, do force fields stop them from damaging the player. I dont think it does, is there a certain block of code you can insert to make the explosion not damage an FF'ed player?
The forcefield should prevent damage from the explosion itself.
If there are any additional scripts used to deal damage, make sure they go like this (I'll use 20 for an example):
pathtohumanoid:TakeDamage(20)
Rather than like this:
Humanoid.Health=Humanoid.Health-20
Or like this
Humanoid.Health=0
Not sure how helpful this is, but you could also set the BlastPressure to 0. Then it's just cosmetic and removes the need for a ForceField.
If you have a permanent FF, Example: Kohls admin, :ff (Player)
The explosion would not inflict the player, Only to trip the player or fling him.