Ok so I get the clock faces but Ptolemaic doesn't let me add pcs.
Add PCs by opening your favorite piece of music and selecting a note, chord, or other pitch set. The music needs to be in MusicXML format. Both Finale and Sibelius can save in MusicXML format. The only way you can play with the features of Ptolemaic without opening a music file is under Analysis | Tone-Row Analysis, where you can type in PCs and create a 12-tone matrix.
Let me know what you think!