You're a bit late to the party on this one aren't you?
It's been done on Facebook a few times recently and it's been talked about round on here for a few years (I did the conversion on mine 2 or 3 years ago after seeing an article on here?)
Having said all that, there's no video on YouTube yet, so I guess there's still room for more info
If anyone is genuinely interested in how I've done it, I've got the PCB's inside the following fixtures now and I'd be happy to take photos if anyone wanted them:
QTX SP64 pars
LEDJ 7q5 Par cans
Stairville 252/8 bars
Equinox Ballero Moving heads
I've also fitted them externally to Acme Cougars and Acme Fusion moving washes (which is dead easy using the Acme Wireless remote port for power). Generally though it's just a case of finding space in the case for the board, drilling two holes for the LED and the push button switch, one hole for the Ariel and then finding a 5V rail, and soldering to the back of the DMX connectors. With the last lot of pars I got it down to about 15-20mins per fixture, and most of that was pulling them apart and putting them back together again.
Julian