See http://mod-buildcraft.com/forums/index.php?topic=209.0. Either by ignoring or use flint.

@SpaceToad make it that the player has to put in a flint and steel for this (with so much or more uses left) which are fire blocks required. And you call the Item function: onItemUse. That automaticly creates a fire at that prosition you have to give in.

Yup, that was somewhat what I had in mind. Although for 6.0.3, I won't implement item requirements yet.