Here is a link to our Install Page. If you have any questions please ask.
As far as I know, nobody uses your existing grip frame to do the upgrade. The PGI and Racegun are the only ones that take a standard 45 grip cover. From its looks the Centerflag has a basic 45 type frame, and so does the Protech. I might be wrong, but the Racegun has the most standard 45 style frame out there.