Check out http://zenstoves.net/Stoves.htm

I made a side burner stove that works like this one http://zenstoves.net/BasicSideBurner.htm
just i changed the design – hope to get some pics up later so you can see how i prefer to do it .. works pretty well ..

It boils 3 cups of water to a rolling boil in about 7 minutes, using about 4 tablespoons of Meths (methylated spirits) ( its all i could find at the shops) and its tiny … total burn time was about 10 minutes

my design is substantially simpler .. just need a can opener and a pair of scissors …