I have a PPC Mac G5 which is been installed with Mac OS X 10.5.7. I have an application that is Adobe CSI CS4 1.0.1. The problem is that the application is not able to install well. I have tried to make it install and manually process the update to the system but I am not able to install to the system. I do not know why this happening? Please do help me out so that I can make the issue to be sorted well and get work with the system.