I'm using the ibfonts.lzx package from the IBrowse homepage/mailing list and elements of the
http://www.kittycat.co.uk tutorial:
On my A4000T I've installed the ttf.library and configured the TrueType outlines according to the tutorial with the Font manager. Normal font is Times New Roman, fixed width is Courier New.
On my AmigaONE I've done pretty much the same thing, only I'm using the downloaded fonts with OS4's built-in TrueType engine. Unfortunately, it doesn't allow grouping fonts into families (Normal, Bold, Italic, etc all get a single .font and .otag file) like the ttf.library. The fonts are better looking, though.
Then I just added the other fonts to the list: Andale Mono, Arial Narrow, etc., etc. I put in the smallest font at size 10, and then let the Range button take care of the rest.