I just finished compiling my Carcosa / Mutant Future character generation rules into a PDF.
Check it out it!
Note that these rules assume the use of the Mutants & Mazes section at the end of the MF rulebook. So we're talking D&D style characters (with 1HD at 1st level, not CON HD), possibly with mutations from MF.
Also note that in the end I decided to make the ability to learn and perform sorcerous rituals a special skill -- that is, not available to all characters. It kind of seemed to make more sense that way.