How do I properly install Adobe CS5 Master Collection?

I have tried to install my programs with Disk 1, which has the setup file for the programs however, when I get to 51%, the installation stalls and tells me: "Insert disk 2 to continue". I'm at a loss because I insert Disk 2 and nothing happens. What I mean is that there is no set up file in there. What am I doing wrong? Thanks in advance for your help!