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?
You need to use older Minecraft launcher (prior to 1.6) , because of said change. Try to search for it, but for sure you cannot use the latest version of launcher.
EDIT: found some link for you : http://www.technicpack.net/modpack/minecraft-152-launcher.163029
Or you can use Technic Launcher, which should have no problem with that. You actually can look for some 1.5.2 modpacks and copy/edit the files for you - just replace mods and configs. There is still a LOT of those modpacks, Tekkit like ones for example.