I'm afraid I don't know what I'm doing with the .xml reteo pointed me towards. The latest version of COG I can find is "CustomOreGen-1.7.10-1.2.24," but it's clearly been updated since then. I'm afraid I don't know my way around github to download a newer version. If that's even the right way to go about it?
Would you mind explaining how to get the most up-to-date files for COG? Maybe that'll help solve things.