the Hershey fonts

Well I am repating this question once more since no one has answered.
Surely someone out there must now something about these Hershey fonts.
I guess what I am looking for is some kind of font editor that could
handle this font family.

I wonder if someone could give me some advice how to add extra
characters to the fonts that are used in grass. I would like
the add the swedish characters a and o with dots above. From the
README file in the original font directory in the source code they mention
that it should be possible. But they don't tell how to do it.
I would be very glad for some advice about this.

Lars

Lars Schylberg Email: larss@fmi.kth.se
Dept. of Geodesy and Photogrammetry or : lasc@celsiustech.se (new)
Royal Institute of Technology (KTH) Tel. +46 8 790 86 33
S-100 44 STOCKHOLM, SWEDEN Fax. +46 8 790 66 10