I kind of think you mean How do you use them So just so we cover all possibilities here.;
1. If you are asking how to create crossfire hacks please refer to Coeus's post and go to the Crossfire Hacks Source Code, Or enroll in a class that we offer here;
2. If you mean uploading and using hacks you first need to verify your MPGH account You may not download anything without doing this!
To verify your account follow these steps;
When creating your MPGH account you must register with an E-mail that is your own, Please go to this E-mail and search in your inbox for a message with the title "Action Required to Activate Membership for MPGH - MultiPlayer Game Hacking"
Within this E-mail will be a message that states;
"Dear __________,
Thank you for registering at the MPGH - MultiPlayer Game Hacking. Before we can activate your account one last step must be taken to complete your registration.
Please note - you must complete this last step to become a registered member. You will only need to visit this URL once to activate your account.
To complete your registration, please visit this URL:"
You must click on the long unique URL provided here for registration to complete.
If you used an E-mail you don't have access to or wish to change it go here;