Reliant_turbo posted a thread about modding the heatsink and it has a great pic showing the LEDs.
Reuse the plastic centering isolators on each LED. Make sure the stars are the same thickness as the original stars. I'd use Fujik on it as it will allow time to center the stars. I'd center the stars by getting them loosely into position then using the reflector itself to position the emitters perfectly until the Fujik sets. Tightening the reflector to the pill will also squeeze out the excess paste for optimal heat transfer. Once the Fujik is set, remove the reflector, solder the wires to the pads, reassemble and enjoy! Should be fairly simple and straight forward. ;)