You have two issues here:
1) Yes, you actually do need to check the convert to spot color or is not truly the RVW color color. Just set it in the queue before adding a file. Double click on the "A" or "B" folder icon (to the top left of the Versaworks interface. Next to the little
computer and picture of your printer.) Then set it there. Then it will always be checked (As is should be)
2) The Roland color system library swatch set for corel (and illustrator) is in the actual program folder for versaworks.
if you installed in the default location its here:
(64bit os) C:\Program Files (x86)\Roland VersaWorks\Swatch\CorelDraw
(32bit os) C:\Program Files\Roland VersaWorks\Swatch\CorelDraw
Then you can add that to your Corel pallet and use those spot color in the designs.