The problem with NEI has been that some of us accidentally enabled BoP during the process because I think at one point it was on the list of required mods. However, its an easy fix. Option 1: Just reinstall the pack and this time dont click BoP. There's a Bibliocraft addon that has the name Biomes O Plenty in it, but oddly enough doesnt require it. Option 2: Delete Biomes o' Plenty from the mods folder