aftermarket projectors are usually H3 bulbs. they're about the size of a peanut. you'll never be able to squeeze a HID bulb in there properly without cutting it up. besides, the "bad things" you've heard about aftermarket projectors are all true. so why bother screwing things up even more. they're for show only, and function like crap.

you're still in denial about the HID's. only way to do this right is to spend a good chunk of change, which you weren't willing to in the first place or else you wouldn't have ghetto-rigged salvaged Audi HID's to begin with. a number of solutions have been proposed already.