I'm trying to remember what I did...
Basically in a line north-to-south:
Think of Pac 12 as the western-most schools including Hawaii. Move east and put those in the MWC, move further east and put those in the Big 12. Then I think starting at the southern-most texas schools and going east along the southern border, i put those in the Sun Belt. MAC and Big 10 were almost unchanged, but all in the MN, WI, MI, IL OH area. ACC was basically the schools on or near the actual Atlantic Coast (I think I moved Rutgers there, as an example). For conference USA, imagine if there was an area in the US called the MidEAST, and SEC was all, literally, in the SOUTHEAST.
It made all conferences a mix of powerhouse schools, "mid-majors," and the absolute bottom-rung. This is from memory without looking, I'm not even certain I still have this dynasty saved. I may have also imported a handful of FCS teams from Teambuilder and replaced the likes of UAB, Idaho, etc.