I didn't get this to work yet.
config.cfg says:
wps: /.rockbox/wps/SpartanBlack.wps
sbs: /.rockbox/wps/terminal.sbs
in terminal.cfg I've added:
font: /.rockbox/fonts/15-Adobe-Helvetica.fnt
in SpartanBlack.wps I've added:
%Fl(2,12-Nimbus.fnt)
But no effect, the GUI setting for fonts will determine the font in both themes. Running the dev version now. Do you have any suggestions?