I finally got my RegExp woes resolved.
The pattern that finally worked was: "^PER NIGHT STARTING
[0-9]{1,2}\s?[A-Z]{3} FOR (\d{1,2}) NIGHTS?$"
For some reason it didn't like the "\b?" in the middle of the
"[0-9]{1,2}\b?[A-Z]{3}" part, but "\s?" is ok.
*shrug*
Thanks for being there. Hehehe...