Homebrew PCBs

I found a maintainance program for these printers. You can do some 
things to the printer which I didn't know you could do. It also lets 
you up load the Eprom data and download it. I don't know what I may be 
able to do with this but maybe somebody else can. Is it possible to 
hack some of the settings like the paper delay? I only looked at it for 
a few minutes and don't understand what some of it is but it must be 
good for somehting. I would still like to see a schematic.