here are some tips for installing IC2
IF you are going to install mcforge you cannot use mcpatcher on your .jar until after you have installed it
tutorial:
get your vanilla minecraft.jar
install modloader, modloadermp, MCForge and IC2
install any other mods you want
run your minecraft and close it again, if you havent used mcpatcher, this should work
delete minecraft-1.8.1.jar (this is a backup that mcpatcher makes)
use mcpatcher
all should be well
if it isn't, make a reply
your helpfully, human_dictionary 