Is it possible to use a custom font for this extension? I google around but I couldnt find anything to parse a TTF to one of the array data sorted in the python file.

I would like to know if there is a way to convert my TTF so I can update the data.

No, those are included as paths in the extension, look into the extension directory to find the file (or here: http://bazaar.launchpad.net/~inkscape.d ... heydata.py). You'd need to build one yourself, or find a different way to build them.

Yep I have seen that file, but I am confused how to create that. Can i trace it over and export letter by letter and then add into that array ? Not sure how that array was created.

Seems that's the biggest part of it. Also, there seems to be an additional 'Move' part, which moves to the start point of the letter from a predefined point (maybe the baseline, dunno). That's what the very first instruction in each path is for.

The structure for each single font is this:

font_name = ["path_data_for_char", "path_data_for_char", ...]
and the order of the letters is the same as when you print the glyph table.