From PC Review
MS Word supports the use of the basic text and Unicode portions of OpenType fonts (OpenType TT and
some OpenType .PS fonts (look at the Font listing in Windows Control panel in icon view and you'll note that fonts such as Arial
show as OpenType). Word doesn't support the advanced feature sets of the OpenType standards fully such as those in the expert set
fonts, but Vista does have some support capabilities that Windows XP currently does not.
I think you may find that the OpenType ligatures are supported in Word — type Qu Th or sp with one of my fonts, and see if it changes — but to access the Nut Fractions you will have to use Insert Symbol, and select them from the Private Use Area, just as in PagePlus.
I see that i could add Glyph Substitutions for 1/2 -> ½ etc., which should work automatically in OpenType aware programs. This could also be done with Autocorrect, which could also be used to insert the Nut Fractions. The Autocorrect method works fine in OpenOffice, but you have to type a space to get the glyph substitution.