Lawrence,
Creo Parametric is able to use the definition of the font saved in specific file with ttf extension, only.
For example, in Windows 7 if I copy the following 4 files from C:\Windows\Fonts directory to C:\PTC\Creo2_M070\Creo 2.0\Common Files\M070\text\fonts directory, then I can use 4 variants of Arial font in Creo drawing. This means I have the same functionality as in MS Office suite.
---
arial.ttf ... Arial
arialbd.ttf ... Arial Bold
arialbi.ttf ... Arial Bold Italic
ariali.ttf ... Arial Italic
---
Of course, Creo is not able to tweak Arial font - MS Office has such functionality.
Martin Hanak