It's probably different in Canada, but be aware that alcohol stoves (homemade or even commercially made) violate Boy Scouts of America safety policy. I know it's frustrating, but that's their policy. Go kick a lawyer. I think homemade wood-burning stoves are fine by them and probably more useful in a pinch.
http://www.scouting.org/scoutsource/HealthandSafety/GSS/gss06.aspx Thanks Ratbert. Step 2 after initial brainstorming is always to review of the leader's handbook and the policies and procecures manual, before planning the lesson/meeting. I usually understand the limitations. Safety first!