Hi, I finally came around and compiled a brief tutorial on how to create glcd fonts for Midibox NG.
It can be found on my wikipage here.
I hope it´s comprehensable. If any questions arise, don´t hesitate to ask. I will try to help as well as I can.
Also, if you find any mistakes I might have put in, just tell me.
Have fun!
my regards
EDIT: Update 01.05.2014: Small changes, mostly fixing linguistic errors and adding additional hints.
EDIT: Update 11.05.2014: -