Plasma wallpaper changing via D-Bus

[Renan Cakirerk]

I'm an intern at Pardus Linux distribution and we have an application 
named Kaptan which allows you to personalize the settings when Pardus 
boots the first time. Kaptan allows us to change the wallpaper. But we 
cannot see this change in real-time. So what I need is to call Plasma 
via d-bus and tell it to change the wallpaper.

I would appreciate any assistance or advice on which file(s) I should 
modify to add d-bus support for the wallpaper changing feature.
(kdebase-workspace-4.2.4/plasma/shells/desktop)?

Thanks,

Renan Cakirerk