ROM Hack Need help with YY-CHR editing multi-ROM menu graph

[sharklodon]

Hi,

I need help using YY-CHR to modify menu graphics entry in a GB multi-ROM cartridge.

I'm creating custom multi-rom cartridges with 256M_ROM_Builder tool but I'd change the default menu graphic and I don't know how to do it.

This is the default menu:

Could you help me about how to do it? A Tutorial?

Thanks,
Shark