[XeTeX] supplying missing glyphs?

[Andrea de Leeuw van Weenen]

David Perry wrote:
> In addition to the fonts Herb suggested, Junicode, Gentium, Charis SIL and
> Times New Roman (the latter being the version supplied with my Windows
> Vista
> system) have all these characters.

This is probably a stupid question, but
how can I upgrade the Times New Roman on my XP computer, which doesn't
have some of the characters that are in the Times New Roman on my Vista
laptop?
Will just deleting and replacing it with the newer font work? Or do I get
into trouble?


Andrea de Leeuw van Weenen
Tjalkenwerf 3
2317DD Leiden