I tried in such way:
1. f&b3 -> cg4.shx
2. SHXCoDec -> cg4.smg
3. 3G Font-Tool 2.3 -> crash!!!; Moto Lang Editor 2.2 said "This file is not langpack!"!!!
I was able to change font to Comic editing smg in hex. I also discover that 3G Font-Tool crash because first bytes of cg4.smg wasn't "A3 7A". When I changed the value it was good. But corrupted file was created.
I paste hex from Comic to smg in proper offset, but there is ~12kB free space between my font and original smg data. After flash it looks good, but what if I want to change to font that is >124kB, Which values should i change to build it properly?