If you can solder and can follow directions and look at a diagram there is a write up and diagram by road race to wire the 1g CAS in a 2g car..
http://www.roadraceengineering.com/1gcasin2g.htm Its really not difficult.. you can do it in less than 5 min.
also check out vfaq.com its your friend.. tons of useful dsm info there.