Help how do i hack mod packs

Hello MPGH Community,

How do you make a normal minecraft hacked client work with modpacks or something like that. I want to hack modpacks like feed the beast and other things and be able to cheat with godmode xray and more. if anyone has any tutorials or would just like to help overall it would be greatly appreciated

Thank you MPGH Community have a great day.

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Update the Modpack i will be using is Feed the beast Infinity Evolved