In your "HOME" folder, there is a file, called "USERENV.dcls."
At the bottom of the file, you will find this declaration:
catia.MODEL = '$HOME/db';
catia.PICTURE = '$HOME/db/picture';
catia.LIBRARY = '$HOME/db/library';
catia.SHEET = '$HOME/db';
You can change your default directory by changing the variable represented by the folder "db." (to whatever you want)
Modify the text, and save. It is recommended that you do a "save as" of the original, before modifying, in case you screw it up.
Please note: if you change your home directory, you will have to make sure that the new folder are part of the same group, and you are the owner, or a member of the using group. Otherwise, if you do not have the correct permissions, you will never see it. (you may have to have an admin setup the permission for you - I'm not sure, because I only know MY setup)
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