Actually, it is. I have mine working just fine. I even have other mods installed such as Twilight Forest. But, there is a mod that will automatically fix the ID conflicts. Don't mean to rain on your parade, Babymercy, but there is a mod called ID Fix Minus. (I recommend Minus, anyway.) But this should help you. Just put the .jar in your mods folder and you're all set. Be aware that some of the existing blocks in the world may change to the other ID. Just break the incorrect block and put the normal one back.
I hope this helps you.