Consider this a posting then Ed. =)
Did several Windows 2003 to Solaris 10 migrations at my old employer of huge (1+ TB) NetBackup 6.5.x Masters, including keeping the catalog info and changing the hostnames. Spent a few weeks with rsync copying stuff from the Windows Master to a new Solaris server, then transferred the EMM database and the rest of the required files over the day-of.
It's complex, and you'd better do everything in the right order, but it's possible. If you can't do it yourself now, frankly I'd recommend paying Symantec Consulting the $20k to do your first one for you and taking notes the entire time. =) Then you can see whether you want to do subsequent migrations yourself or keep paying.
Our notes write-up of our first migration ran about 7 pages.
Oh, and NB 6.5 doesn't care about the image files anymore as far as the old ^M problem goes, it'll read them just fine post-transfer; the only ../db/images/ files you have to convert are the STREAMS files. Other normal config files outside of ../db/images/ still have to be converted of course. And yes, that was straight from the Consulting guy and it proved out in test restores.
