I'm having a problem with Qt4 in PackageMaker. After generating the installer, I tested it in a virtual machine, but I'm getting one problem, QtGui is not recognized by the other program. As if it would not be installed.
I tried to use aliases pointing to QtGui original, but it's not working.
For information on how to deploy a Qt application on Max OS X I recommend the following resource: Deploying an Application on Mac OS X