I feel dumb for bringing this up but I downloaded the pack and NEI is STUCK on cheat mode. I can't seem to turn it off. Also when I spawn in, I'm immediately in creative mode. Changing to survival does not fix the cheat problem...nor does going into NEI.
I don't know if this will work, and I don't know why this was added awhile ago, but.
Open up NEI/Inventory
Click Options (Lower Left)
Click Inventory(top)
Change the second tab to Cheat Mod, then hit the Global button (Top Right) buttons will show up on the left of every option the one next to cheat mode should be highlighted, click to un/highlight it then back out.
When your back in your inventory/nei window you should have many options you can toggle now, trash, rain, creative, etc. Hit the C to change it back to survival, then go back to the option as said above, then change the second tab to Recipe Mode, or Utility mod. I use Utility mode because it give me access to the trash can. Sorry if this is hard to fallow, I'm Horrible at teaching things.