HKLM/Software/OEM/TFLOSetting/ 3450
Hope that Helps
Thanks T M Z
P.S. If it turns out you think you have a bad screen. I have one that you can try for free. I can send it to you. If it works great. Just send me $25 for it. If it doesn't work you can just send it back.
P.P.S. Hope the settings do it for you. Much, much easier.
http://forum.ppcgeeks.com/showthread.php?t=30009
http://www.pdacenter.ru/razborka/razbor_htc_touch/