Any support related questions for the inteenimator should be asked at that site.
I'm not familiar with the triplets and quads hack, as I don't use it, but I'm sure someone else will help you. I don't know if it works with teens or if it conflicts with inteen or whatever, but again...I'm sure someone else can help you there.
Now, as for making your own custom content, that's such a broad subject it would be hard to tell you everything you need to know. Try looking in the tutorial section
here.