If you have it tuned correctly it should work as a semi auto as used normally. You get the rapid fire effect by holding the trigger down at the set "sweet spot". In other words, assuming that it's installed and tuned correctly, you need do nothing.
there should be a screw someplace inside. see if you can get a manual for it or something, it will tell you exactly what you need to know. I think your'e mistaking the responce trigger with the electronic trigger. the responce trigger simply uses air to returnt he trigger faster, not make it full auto. You can use it fro full auto if you hold your finger in just the right spot though.