infinite casting

Hi

I'm trying to make a spell castable infinite times per day but the only way I've found to do that is to apply opcode 316 to it and that would have the unwanted side effect of making everything else castable infinite times per day as well.

So I'm looking for a better way via scripts but I can't find an action to restore a spell that has been cast... is there one that I'm missing? Or can anyone think of some other way to implement this?