neither have i...
p.s. interstingly, one of my fellas put the installation files on 3 CDs. he started the install, rebooted, everything was okay. then when the installation was 30% done (~) it said "the installation cannot continue. please insert valid Windows Vista CD/DVD". oh wow, he poped in the 2nd CD and went all the way to 70% then a 3rd CD and it installed gracefully.
now i'm talking about Beta 1, of course. so it is possible to install with CDs, but with a high risk due.
still standing on my opinion, even though this post is outdated - Vista Installation should be taking place with a DVD.