they sell the digitizers on ebay for most touch phones pretty cheap. the link fishingmedic posted says it needs to be replaced with the lcd. i think that's bullshit. if you have the little plastic separating tools you should be able to do it with out replacing the lcd
http://cgi.ebay.com/HTC-Touch-Pro2-P...item1c0b8659e5
http://cgi.ebay.com/7-PLASTIC-PRY-TO...item4a9e8e89a6
unless you are clueless when it comes to taking stuff apart and putting it back together it shouldn't be much trouble. i have taken apart many cell phones it's easy just take your time and pay attention to what order you are doing things so you can reverse it putting everything back together