I'm sure you've got the answer by now, but I just stumbled across this and thought I'd add it for you or anyone who follows.
The installation was actually pretty painless, with a few catches. I popped the first RedHat cd into the docking station DVD drive, and booted into the install program. Unfortuantely, there are no ieee1394 drivers on the boot disk that support the vaio's docking station, so I had to copy all the files to a neaby computer and share them via ftp. Once I told the install program I wanted to do a network install, it found the nic, got an ip address, and the rest of the installation went fine.
Hope it helps.