PUR3 iNTENSiTY4

So Flan's mod and AE2 don't seem to work because there are two of the same dimension IDs. I know I have to go into the config files and change stuff up but I don't know how to do that and what to change. Can someone please give me a walkthrough on how to do so pls. crash report: https://pastebin.com/Frz5kUue

Can you walk me through step by step on how to do that?

So I have a bunch or COFH mods and they require codechickenlib but once codechickenlib is installed it says it doesn't work. All mods are up to date, I made sure there is not other offending mod, I have the latest forge, and it still claims that its not working. How do I fix this? Crash report: https://pastebin.com/T0QLDErE