If you want to convert a Windows Mobile 6.1 handheld into kiosk mode, you can try out SureLock Studio. You can download and evaluate the fully functional version for 30 days.
With SureLock, you can easily lock down Windows Mobile devices into kiosk mode. This ensures the users can only use certain applications and features of the mobile device as allowed by the administrator. Access to device functions such as browser, games, Activesync, camera, keypad, today screen etc can be easily blocked using SureLock Studio (deskotp tool). Then it's just a matter of installing a CAB file and voila! your companies mobile devices goes into kiosk mode.
Check out SureLock Studio product page.