How to exclude specific System infrastructure from my cocoa application

I am running a Cocoa app and have to use my own authentication related libraries. However, the Cocoa project by default loads the system framework that contains the Kerberos and GSS authentication libraries (System / libraries / Framework / Kerberos.framework and System / Libraries / Framework / GSS.framework). I need to remove links or unbind these specific frameworks. Can anyone help me figure out how to remove them?