[NTLUG:Discuss] desk top wallpaper questions

[Jack Snodgrass]

Two questions about the desktop wallpaper.  I'm running gnome with Fedora FC3. 

1). is there a command I can run from a shell to change the wallpaper
background.
I have found a couple of programs, but they don't seem to work. They try and 
do more that I need and support different distributions. I just want a
simple command
like: 
new_backgroud.sh filename
and poof... I have a new background. 

2) When I do change the background, I get the same background on ALL 
virtual desktops.... I am pretty sure that the answer is no.... or change window
managers... but just in case there is an answer....  How do you specify a 
different wallpaper for each virtual desktop? again... gnome/fedora. 

Thanks - jack