I owned a Tilt for a very long time, so long, that I replaced almost every part of the phone. This was a difficult and time consuming process. I would definitely find out what it would cost to have it done professionally and compare that to what the digitizer plus tools to disassemble your phone would cost. Not to mention any warranty you might no longer have, labor, possible damage...etc.
As far as I'm concerned, having a legit reason to take apart my phone is right up my alley, so it's all up to you. Either way, let us know how it works out and I wish you the best of luck.
PS, pics will be awesome if you do!