hellrayzer

Hey all, I've been trying to make a radio mod that has custom music using the guide made by Azakaela, but I think it's outdated, not to mention there's a lot of information that's missing or not properly explained. There doesn't seem to be any other guides on the matter and it's become pretty frustrating, so posting here is kinda my last resort. Anyone able to help me out or point me in the right direction?