I just got my January update from MSDN, with the final release of Vista. I flicked through and grabbed the ISOs disk and mounted them in a Virtual PC. After an hour or so of it chugging away going through each of the 4 ISOs, it pops up asking for Disk 5. I didn't see a disk 5, so I check again, no disk 5 there. I googled and found this on the MSDN subscribers blog.
We Goofed! As I was putting together today’s blog post, an alert subscriber emailed indicating that DVD 2429.5 from the January DVD media shipments is missing the CD ISO image for Windows Vista (English) - Disc 5. We’re in the process of correcting this on our end and anticipate sending an updated disc to affected DVD subscribers in the March 2007 shipment.Argh! That's a wasted evening, admittedly I should have just used the DVD version, not the ISO disk, but I was in a hurry.