Fixed width font question

[SorishLD]

I've been hacking at the user experience bar, trying to use a lighter font style then what some other's have programmed. However, I need to find out how to use a fixed-width font instead of the proportional fonts in order to do the % exp display correctly.

(The big problem with overlaying the blue exp number over the yellow exp number is that numbers in the base EQ2 font are not all the same width.)

Does anyone have a list of what fonts are 'allowed' within the XML file? Or do you know how I can add in one of the mono-spaced fonts? I don't want to change the entire UI font, just force it to use a better font for the numbers then it currently has.