Erm... well, first you get the alcohol stove.
Then, you'll need to light the alcohol stove (as in photographic lighting). I used a single Speedlite, snooted it (to minimise light spill), and bounced it off white foam card.
In simple English, the stove is illuminated by light being bounced off white foam card (from the right - the right side brighter than left side). To prevent the shadows on the left from turning completely black, add a reflector. I happened to have some aluminium foil (leftover from shooting the hamster) so I used that to kick some light back. In case this does not make sense, the Speedlite is off the camera, triggered by PWs.
That done, take a flash meter reading, which reads ~ f/8 at ISO 400. I set ISO to 400 as I want to use the Speedlite on lowest power to prevent light from going everywhere but I need some DOF, hence ISO 400.
Then, light the stove [ as in set it on fire... =D ], expose for the flame (shutter speed ~ 1s).
Long-winded in writing, but quick and dirty once you get down to doing it. The flash metering part is optional, with digital just trial and error. I prefer to meter as I can't gauge very well from the LCD.