Disable Open/Upload Dialogs

[Aniyan Rajan <aniyan rajan6 gmail com>]

Hello,

I have found that setting the following, in gconf, will lockdown the Save/SaveAs feature for the entire gnome.

/desktop/gnome/lockdown/disable_save_to_disk

Similarly, Is there any way to lockdown the File Open / File Upload Dialogs in gnome ? 
I am implementing a kiosk environment in gnome, which doesn't want the filesystem to be visible to the users. So please suggest.

Thanks,