HelpTekkit Cracks..

With any crack I've been using, I'm always required to make an account on Mojang when I register on minecraft. So how the hell do I go about making Tekkit work now? Even when I use my Mojang credentials, it says invalid, when I know for a fact its valid on Mojang/Minecraft.net

Learn to code and decompile the launcher,Then remove the http request to mojang account site so then make the launcher give you the option to play.