how to put "MOD" Minecraft on iMac part 1

I downloaded mod loader

downloaded some mods

got rid of original bin folder

inputed in to terminal


cd ~
mkdir mctmp
cd mctmp
jar xf ~/Library/Application\ Support/minecraft/bin/minecraft.jar

put the class files in the newly created folder

inputed into terminal

rm META-INF/MOJANG_C.*
jar uf ~/Library/Application\ Support/minecraft/bin/minecraft.jar ./
cd ..
rm -rf mctmp