Can a wine app access files outside of the wine drive_c environment?
Wine manages the drive letters through the ~/.wine/dosdevices directory. On my system with the default configuration, I have:
$ ls ~/.wine/dosdevices/ -l
total 0
lrwxrwxrwx 1 james james 10 2010-07-21 22:51 c: -> ../drive_c
lrwxrwxrwx 1 james james 1 2010-07-21 22:51 z: -> /
So, the ~/.wine/drive_c folder is mapped to c:, and the root folder is mapped to z: (which means wine programs can access my home directory as z:\home\james).
If I wanted to expose my home directory as h: directly, I could do it as follows:
$ ln -s $HOME ~/.wine/dosdevices/h: