Go to HKEY_LOCAL_MACHINE\SYSTEM\GDI
Click Edit , New key
replace New Key #1 by Uniscribe
Click Edit, New DWORD Value
add value name and value data.
Value name: DisableUniscribe
Value data: 1
When put value data: 1, Uniscribe is disabled, and it is enabled when replace to 0. For Windows Mobile 6.1 and 6.5, I recommend to put Uniscribe value data 1, then go to address bar of internet explorer to type Khmer unicode website, example: www.rfa.org/khmer, then add to Favorites... for next time, we don't need to type domain name again, just click on Favorites to access Khmer website.
Then turn Uniscribe value date to 0, and restart for reading webiste.
uspce.dll for complex script rendering is not compatible with Windows Mobile 6.1 and 6.5 yet, so when we put Uniscribe value date: 0, Khmer script rendering is good, but we can't see letter on address bar. So we need to turn off Uniscribe when we need to type new website address.