I installed Centos 5 on a VM this morning using CD images. By default, the install requested CDs 1, 2, 3, 4, and 5. I removed every package group I could find other than base, and the install informed me that I would need CDs 1, and 5. The install progressed, and the progress bar reached the very end before it requested CD 5. I reluctantly attached the ISO, anticipating that I was about to witness something excruciatingly disappointing. The 5th CD was only used to install a single library package. Really? Really?