I'm tired of waiting for support of russian symbols in txt files. So... I've spent 2 days analysing resource.bin file... Don't really remember how much coffee I've drunk

The result of this "reverse engineering" is
m6_patch_font tool.
It makes possible to read russian txt files.
Download
Usage
Download m6_patch_font.zip and extract it for example to C:\Temp.
Place resource.bin file to C:\Temp.
Run in command line:
m6_patch_font.exe resource.bin russian_remap.txt output_resource.bin
As the result output_resource.bin will be created. Copy it to your player and rename to resource.bin. After restart the player will update its resources and you'll be able to read txt files with russian symbols.
Tested with T1.010 RC4.