How set INT as ability for spell-like abilities

[Aril]

I'm trying to code the Lantern Dragonette, and they get several spell-like abilities. But they use the INT bonus for calculating save DC, rather than the CHA bonus.

How do I do that? There doesn't seem to be any way to set the saving throw, and which abilities to use for generating saves, when I'm using the Race menu.

I tried creating a special ability, and then bootstrapping in the relevant spell-like abilities, and then setting the "Standard DC" field to Intelligence and then picking "Class DC uses full level"....but that didn't work either.