How to Install Hacked Clients

1. Use the Digiex launcher!
You don't need to switch out jars to do this! Just select your jar, and you're ready to go! (Place jar in bin folder in .minecraft)

OR

2. Switch out the jars (Manual)

WINDOWS:

1.Go to start
2.type in “%appdata%”
3.Navigate to “.minecraft”
4.Navigate to “Bin”
5.Delete the jar file named “minecraft”
6.Move the hacked client you want to use in to the bin folder.
7.Make sure the hacked client is named “minecraft”

Linux
1. Go to "files"
2. Press Ctrl + H
3. Select .minecraft
4. Go to .bin
5. Delete the jar file named minecraft
6. Move the hacked client into .bin
7. Rename it to minecraft

Mac

I have no idea!
Here's a video from Youtube: