How-to Install Minecraft ModLoader Tutorial + Download :)
Download and install ModLoader
*Navigate to your minecraft.jar file. This can be found by opening up Minecraft, going to the options menu, and click “Game location on disk”.
*Then navigate to the bin directory and open minecraft.jar in a program such as WinRar or 7-Zip
*Delete the META-INF folder.
*Move the files from the ModLoader.zip file into Minecraft.jar.