cousin rebel ,if you plan to use script generated doorways, use them on new domains. You are risking to get your established domains banned and honestly doesn't worth the risk.
BVF has a good point,but at the moment with all the SE spam going on I can tell you from the feedback i get from SE boards, any kind of page that looks autogenerated to these freaks has a high possibility to be considered as a spam attempt..... With a brand new domain you dont risk much things
