[Wine] In WineXO, how to change drive_c location?

[alejol0]

Hi, people!
Because XO-1 has a little "disk" space, it will be nice if
the location of drive_c can be moved to a SD card.
Here in Uruguay, we do not have root permissions in our XO-1.
We log in as user olpc an can change permissions only in some
directories.
And can create links to files but not hard links to directories.
The SD card is mounted in /media/label_of_sd_card.

I appreciate any help.