[Sam Waldorf] “I could not shoot 24PN then use firewire 400 to transfer it to a computer for editing in Final cut 5? “
Sure you could, FCP it was called P2 import (if I remember right) these clips are true 23.98 so there is no extra frames to remove.
[Sam Waldorf] “and with 24PA, do I treat it any differently than I would just 24p on the XL2? as far as capture settings, timeline options, etc.?”
24pA is the scheme that panasonic uses in an interlace environment and on ingest remove this pull down to once again give you 29.98 progressive frames. Panasonic gives you the option of pA on 1080i and 480i.