Dammit kits people!! kits!!! lol
I suspect with an extra injector controller such as the greddy it'll have a boost pressure point in which the extra injectors'll start actuating. That would be your best bet.
Also another problem is you would need to find a way to turn on the solenoid. I know the tec II has an option to send out a signal based on differnt criteria. I dont' think the emanage has that though.
Jeff: I swear everyone thinks that's an afc..lol it's a AVC-R.
I like your idea...if I don't find a kit I like I might run with it.