This is a Khmer spelling checker developed by PAN Localization and in a stand-alone program or embedded in Microsoft Word3. If you need help using it you can download the corresponding help documentation here.
Download (it includes all of the PAN Software): PAN Khmer Spell Checker
NOTE: To use this PAN program in Windows XP you need the .NET Framework. Get it here
Mirror: Temporary Download Location because pancambodia.info is down – click here to download
is there a version for Window 7 and MS 2007 or 2010?
Unfortunately there is not. You can try e-mailing Microsoft requesting support for a Khmer spelling checker here (the more people that request it the higher possibility of them doing it): http://www.microsoft.com/mscorp/execmail/feedback.mspx