Is it possible to always have Not Enough Items set up every time I play Minecraft even without Forge? Can I for example open Minecraft and choose my normal profile not Forge, and when I play have Forge set up. If this isn't possible can I make another profile that uses N.E.I. only and leaves the other mods I have for the forge profile?
According to the Minecraft Forum Thread, Not Enough Items will not work without Forge. Which means you need to have Forge installed. If all you want is NEI, just make a separate profile containing only Forge and Not Enough Items.