There was a way to enable mana regeneration in Risen

Hello all,

I was wondering if there was a way to enable mana regeneration in Risen (or a mod that would do the same without really any other changes?)....nothing too rapid, something comparable to gothic 3, perhaps even a bit slower?

I know this would likely unbalance the game, make it too easy, etc....still I would have more fun, so hopefully there is a way to do this!

Thanks very much in advance!