I know how to generate blocks using the old modloader, but with the new FML changes, the generateSurface method no longer applies. What do I do? Is there a new Method?

Please help, Thanks.

Correct me if I'm wrong, but you basically have to make a new Class file that implements IWorldGenerator, register it with GameRegistry, then have fun from there.

 

If you need more detailed instructions or just a proof of concept, here's my mod's ore generator.

Thanks!