Funny you should mention that! I just installed one of the Dealextreme drivers and Seoul emitter in mine... here's the parts I used (I was searching for the exact same thing you did, and got the same results (>_<*).
Inova XO3 (TIROS model)
SSC Seoul P4 (U-bin) SW0 Bare Emitter
3.6V~9V 800mA Regulated IC Circuit Board for Cree and SSC LEDs (4-pack)
I got the Inova open after putting it in the freezer three times (water in battery tube freezes, expands, pops the front out). I put a penny in the rear between the tube and cap to prevent the water from blowing the end out.
Once the optic was out, I pressed the driver out using a hammer and PVC pipe; it will pop out the front, not rearwards. Pulled out the old chip and glued the driver in, then wired the LED. Put everything back with the optic as far against the LED as possible, and you're set!
Some things to remember:
The driver is mounted to an aluminum slug that has been press-fitted to the tube; I had to file the sides down on mine to get it to fit back in there.
The Seoul emitter sits lower than the Luxeon, so I put a thin washer around the base of the slug to get a little more standoff away from the battery end; some people just put a piece of copper under the emitter.
The freezing process may have taken the dome off of my light, not sure if it was damaged before though; I only opened her up to replace the driver so I could use the R123 cells... the driver came out damaged, but I am trying to fix it so I can see if it works.
With the Deal Extreme drivers, the positive contact is in the middle of the board, so the batteries go in positive end first.
I have to take pics, but so far it seems a lot brighter and the hotspot is a little wider; it doesn't throw as much as my modded Dorcy Metal Gear (same emitter and driver, converted to run off of 2 X 123's), but it is built a lot tougher and the beam is a little more useful now; the hotspot is about 16 inches across when shone on a wall about 10 feet away.