Spellbook
The Spell Book tab allows you to create/edit a weenie's spell probability. Please read the gmriggs write up on how the spell book probability works here Spell Books.
In Weenie Fab, you can now see how the probability relates to the actual percent chance of a spell being cast.
If you click on the Generate Probability Details Button, it will generate a report so you can quickly see the actual percentage chance that a spell will be cast. This is a quick way to see how an existing spell book works, and how often a spell will be cast.
The Change Actual Spell Chance button opens a window to where you can edit the actual percent chance, instead of trying to figure out how to do it via probability.
On this window, you can click the spell, change the actual percentage chance it will be cast. If you click OK, it will then take your changes, and generate the probability spell book for you. This helps take out the mystery and guessing of how often a spell really is cast.
Credit to gmriggs for the sample program on which this was made possible.