Yeah, i'm positive. I had a previous world that was crappy with BoP enabled. I love my current world but i may just disable all the biomes i dont want in the config and do BoP terrain again
The mod itself is enabled in the 1.6 packs. It wasn't in the older ones. Only a few of the BOP biomes are enabled in the configs of the new packs. I think the DW20 pack only had around 5 enabled. I'm guessing they enable certain ones so you can find the BOP gems you need to get to the promised land and access amethyst. In order to get BOP biomes in your world, you have to go into the options when you create a world. In the same place you can set starter chest, structures, and cheats, you can adjust the biomes. The options are default, flat, large biomes, and BOP. Without selecting BOP here, you won't get BOP biomes in your world. It has nothing to do with the mod being disabled.
If you didn't generate the world with BOP terrain gen, but have not disabled the mod, you should still find mystcraft pages for the BOP biomes. I find them in Horizons and DW20 pack for biomes that are not enabled in the configs to be in the world gen. Even though I will never find them in my world, i can create new worlds with them so I would think the same would be true for your world.