Hi John, Are you looking to use them throughout the entire document, or as character styles? If you want to use them in the entire document, you can simply add the LaTeX code to the preamble (Document > Settings). If you want to create custom character styles, you can create insets which include the needed code.
This webpage has a bit more on the latter technique: http://blog.oak-tree.us/index.php/2009/11/14/customize-lyx-character-styles If you don't have font definition files, you could also make use of them using XeLaTeX. The process for doing this in LyX 2.0 is pretty straightforward, but requires a bit of additional work in LyX 1.6. Cheers, Rob
