I made this mod of new combos thanks to Daxar's (on infernofans.com) liTools. If you want to read more about how to mod the Little Inferno game, such as letter variables and new items to burn, there's also this topic:

http://infernofans.com/forum/mods-and-hacks/10907-semi-tutorial-making-n...

I've enjoyed playing a lot of the WoG mods from here. Hope people try to mod Little Inferno, too. It's quite possible.