There is a link to the TrueType Viewer in the tutorial thread — Adding OpenType Features. It is a free utility useful for testing that OpenType features are working as intended.
Read the tutorial thread, examine the attached script “Guru.txt” used by OpenType Compiler to convert Guru *.ttf to Guru *.otf, and then try it on your own fonts. The script uses postscript names so the extra superscript glyphs don’t actually have to be mapped. Postscript names can be copied from one font to another using Paste Special.
The attached Transform script will add a full set of Ordinal glyphs to your fonts.
Ordinals.xml (1.23 KB)
Guru.txt (15.6 KB)