Had the very same problem.
What to do with the acsm file, here is the "simple" solution:
I put the acsm file in the same dir where the ade-exe resists, in my case:
~/.wine/drive_c/Programme/Adobe/Adobe Digital Editions
I change to that dir and than execude this command:
Code:
wine digitaleditions URLLink.acsm
and then ADE downloads/imprts the book to your shelf.