Using Addons - Randores/Randores2 GitHub Wiki
Installing
Randores Addons are just like any other mod. Just drop them in the mod folder, and Randores should be able to load them.
Usage
Adding addons to Randores was... a bit tricky. One of the most important things is that the random ores generated for any world must always be the same for that world seed. I was able to make that happen with addons, but at a small cost: if you generate a world with some addons, remove an addon, and generate another world with the same seed, the ores may be completely different. Why? because [blah blah code reasons blah blah]. However, adding a new addon to an existing world should never break, which is good.