I don't think reprogramming is necessary for the engine to work, but you'll be limited to the Tiger's lower rev limiter.
If you want the increased rev limit:
I remember reading a thread about a guy at a specific dealership that could modify them, but I haven't been able to track it down.
I did find this one though:
Rev limit thread
I just might have to try it (although I can't afford to fry an ignitor box after all my winter mods, let us know if it works)
[ This message was edited by: BadMouth on 2006-11-06 21:11 ]