Just open it up in windows, look at the name and keep that in mind. Place the font file in \windows\fonts via activesync. It will complain about not being able to do it, just say ok, it will work. then you can configure your applications to use that font. If you want to change your titanium font to it, look at my thread
http://forum.ppcgeeks.com/showthread...52#post1019352
Also when you put fonts in \windows\fonts (at least for me) the first font in the directory is what will be used for the phone application... so maybe put tahoma and call it aaatahoma.ttf if you wanna keep the default dialer font.
I think no2chem makes an app to change the fonts system-wide called nuefonts. when you place a font file in \windows\fonts it should be selectable in nuefonts.