what a coincidence, I just made a red pointer outta that host. I was harvesting the crystal from a 10mw greenie. After Im done I decided to turn it into a red one since I have a spare 150mw red diode.
I just reverse the battery direction use the case as anode and the cathode will go through the button switch, I didn't use the original driver of the pump b/c I guess it would fry my red diode in a blink. So I wired the spring to one pin of the switch and the cathode of the diode to the other pin of the switch. -Ya! I didn't use a driver, but my diode is doing just fine on its own. The aixiz housing is a bit slim for that host though, I had to use putty, but the putty is not electric conductive, in order to make the circuit closed I had to put back the original head cap of the greenie, by a hammer which means that it's no longer focusable.
fairly easy mod.
Now it's a high power presentation pointer ;D