Thanks for the fast response!
That got me some of the way there; I have set the LONGNAMES flag on in the mountlist and when I type "SetCDFS CD0:" in CLI, I get the following output:
This shows that LONGNAMES is on, but the protocol is ISO 9660 and not RockRidge.
Excuse my ignorance but is this a setting I have to change? Or should I have ripped the CD in a RockRidge format?