How to get 1.7.10 mods into 1.6.4?

How to get 1.7.10 mods into 1.6.4? - 1

Added (1). how do I get 1.7.10 mods into 1.6.4 Minecraft Forge

Added (2). I'm using forge for 1.6.4 but I need customNPCs for 1.7.10 in it

Luc 10.05.2015

If the mods exist for 1.7.10, they should exist for 1.6.4, but you'll have to install them separately, on a different profile. Also depends on if you're using Forge mod loader or doing it manually.

Nathaniel 10.05.2015

You can't

Dima 10.05.2015