I've seen M6 already have tool for support custom fonts changed for a few weeks ago. I need it too, but I have M3. Can I use that tool for my M3 or anybody know how to do it on M3 now?
As far as i know this tool you're talking about only mixes with the resource file, not the system file. And the resource-file for m6 and m3 should be pretty much the same, so i think it could work. Everything you need to do is to try!