Don't know what CSV means (I'm a computer dummy), but here's a situation that I think might cover what you're asking.
I'd been flying 121 airline ops exclusively, and was using APDL. I never noticed that it didn't include my jet time as XC time, until today. So, here's what I did to fix that (I take no responsibility if this makes you lose your logbook):
1) delete my logbook in Logbook Pro (it's backed up on my Palm, and on my computer as APDL files).
2) Adjust the 'autofill' in the options section of LBP to include XC (check the box)
3) Single Sync from the very begining of your data (page 3 of the single sync defaults to your last hotsyc so you don't overwrite data. I had no data at all, so no worries!)
4) Presto - all my time is now XC!
Do not do this if you don't fly 121 exclusively, and you don't have all your 121 time in your Palm.
Perhaps Neil could elaborate on how others might do it in more complex ways, or why my idea is incredibly foolish. It was VERY scary to delete my entire logbook in LBP, but well worth it.