This question already has an answer here:
I have a problem and it is that I didn't get a bin folder for minecraft 1.5.2! Now I can't play with any mods as I cannot install forge! I have read that from Minecraft 1.6 onwards the bin folder is no longer used but in 1.5.2 and below, it is needed for modding. So what happend to my bin for 1.5.2? I'm using the latest minecraft launcher downloaded from minecraft.net. Can someone help me?