Posted by:
John Hudson Using CGJ to trigger the nun hafukha as a variant of the nun is a dodgy hack, and it seems to be working even less widely than I'd anticipated. It works in Office 2003, but apparently not many other places.
You can direcly encode nun hafukha using one of two supported PUA codepoints:
EA01
codepoint used in some earlier fonts employed by Libronix
F300
codepoint requested by SIL
Hope this helps. A proposal to encode nun hafukha as a standard Unicode character is being prepared, and should be submitted to the UTC before this summer's meeting.