i dont have osx, so bare with me.
(i also dont have crossover in english installed, so the names i used could be wrong, but i guess something similar will be correct)
-open the crossover bottle-manager (or bottle management)
-go to the "Advanced" tab
-click "Browse C:"
it should open a "windows explorer" clone, showing the C: drive. there youll find your stuff as usual, like under windows)
alternative:
in your home folder, go to ".cxoffice/{NAME_OF_YOUR_FL_BOTTLE}/drive_c"
(.cxoffice is a hidden folder, do what you have to do to make it visible :) )
from there on, everything should be in the same place as in winxp.
greetz