as suggested by @Black Frog you can not modify the package. It is better that you start with rootviewcontroller for the perticular user type.
If you still want to keep the application size minimum, you can load "resource" required for the perticular "type" of user after first login. e.g. Download and save FusionChart's JS and images inside documents directory only if its been used for the perticular user role. similar way for others
-- Vishal