Here is the current way to install Forge and Sim-U-Kraft, I will be deleting the older videos, as they are slightly out-dated now. Sure you can use a Skydaz installer, but you can install it yourself right now in a few minutes, no more messing about with the minecraft.jar file!
LINKS: Official website where you can download Forge Installer and Sim-U-Kraft: http://satscape.wordpress.com/sim-u-kraft/
Official Forge download site: http://files.minecraftforge.net/ (be sure to get the "installer")
If that doesn't work, try this one: http://lmgtfy.com/?q=how do I download minecraft forge?
YouTube Admin: Video is from Minecraft, a game owned by Mojang, with fair use for entertainment and educational videos. Their very relaxed terms and conditions can be found here: http://www.minecraft.net/brand-guidelines
Audio: Voice over, no music
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