[XeTeX] get xetex to use best fonts

[Lon H Mitchell]

On my system (Windows, MikTeX 2.8), I have Minion Pro fonts installed 
both in open-type and type 1 format, the latter for use with pdflatex 
and mnsymbol.  As a result, when I ask for Minion Pro using xetex and 
fontspec, I get the type 1 fonts.  When using mnsymbol with xetex (and 
mathspec), I get type 3 fonts in the pdf, although the type 1 versions 
work fine with pdflatex.  How can I force xetex, fontspec, and/or 
mnsymbol to use the better versions?



Thanks,

Lon Mitchell