I don't know if this is allowed here. I know that grey map is not allowed in the server but Im willling to risk.
I've been searching for day for guides however the only thing I found is editing data.ini to read your grf and merging using GRF editor which doesn't work.
RO GGH files doesn't have data.ini and I've tried to look too if it was just renamed and still no luck.
Any experts out there that can help?