I just replaced the digitizer on a TP2, it was one of the hardest screen replacement I have done on a phone. You basically have to take the whole thing apart, one of the hardest part is the last part where the LCD and digitizer needs to come apart from each other. If your not careful you will break the LCD, use a heat gun. I dont recommend doing this unless your are familiar taking small electronics apart.
Here are two places I used for reference to take apart.
http://translate.google.co.uk/transl...hl=en&ie=UTF-8
http://www.youtube.com/watch?v=DZ4csh9CdZA
I would recommend finding whole LCD/housing with keyboard, they come up on ebay once in a while for about 80.00, with this you would only need to take a few screws apart.