Thanks man, it works now. 🙂
Never relised, how much sesitive mess is, about names and correct crc cheksum for each game and thats makes all the trouble.
I noticed ini file for each individual system in roms/BIOS/mame folder, but it contain much less content for settings, than full MAME/MESS.
Also I want to tweak some video option to gain more speed, but cant find those sections.
Maybe I need to make those changes in retroarch settings?
Id like particulary to get full speed for galaxy computer, but for now I only acheive about 60%, which is quite unusable.
Is it possible to do something about this.
Once again, thank you very much, your answer was very useful.