HTC Touch Pro2 which is part of the Sprint network has Windows Mobile 6.1 installed by default. If you are looking to upgrade the ROM to Windows Mobile 6.5, you will be able to do it thanks to a custom ROM released by HTC Pedia.
The custom ROM can be applied on devices which are HSPL unlocked. The Windows Mobile 6.5 for HTC Touch Pro2 contains several pre-installed applications including Adobe PDF, Audio Booster, Facebook and more.
You can download the HTC Blue Smoke Sense 2.5 ROM CE OS 5.2.21895 (Build 218184.108.40.206) from here.