adding MCCC was easier than I thought. however, I did loose 4 sims in transferring to a new save. that's because in order to add sims to a new save file you MUST go through CAS. So although I got them all moved into the same lot, I lost 4 of them due to having to open CAS. Just like one of the posters said above, i used the MCCC mod to edit relationships. Too bad there is not boyfriend/girlfriend option, only husband/wife. So I'm not running around rebuilding romantic relationships. Family relationships I was able to do. Oh and I had to change names because Penny, Salim, and Akira were already in my save file. So their new names are Saleem, Kenji, and something with a P for the other Penny. using MCCC i was able to create those relationships.
I plan to keep the mod. I'm finding it very useful