create .deb package, not root

[jmehdi@ubuntume.com]

Hi,

I try to create un .deb file to install a wallpaper (and other  
things). Here is my postinst script:

gconftool-2 --type string --set  
/desktop/gnome/background/picture_filename  
"/usr/share/backgrounds/wallpaper.jpg"
gconftool-2 --type string --set  
/desktop/gnome/background/picture_options "stretched"

gconftool-2 --direct --config-source  
xml:readwrite:/etc/gconf/gconf.xml.defaults --type string --set  
/desktop/gnome/background/picture_filename  
"/usr/share/backgrounds/wallpaper.jpg"
gconftool-2 --direct --config-source  
xml:readwrite:/etc/gconf/gconf.xml.defaults --type string --set  
/desktop/gnome/background/picture_options "stretched"

The last two lines change the default wallpaper so new users will have  
this one. These lines work.

The first two lines change the same options for the current user. But  
when the .deb package is installed it is executed under the root  
account...

I build my package like this:

sudo fakeroot dpkg -b  $WORKING_DIR $PACKAGE

I've tried without fakeroot, with --force-not-root but the wallpaper  
is always changed for the root account and not the current user...

How can I configure the .deb file for the installation be executed  
under the current user account?

Mehdi