Create a game boolean attribute and call it ThisRuleIsDisabled and set it to false. then Wrap any rule you want disabled in a rule that says when game.ThisRuleIsDisabled. Because it is initially set to false it will never be true and the game engine will ignore everything that is within the rule.
Comments
I do a 'cut' - cmd and x - this means the rule's removed, and I can test, and if I want it back, I just paste back into place.
Hardly ideal though...
QS
Ok for testing but no ideal.