open app on specified desktop

[Roger Searle]

I'd like to be able to make certain applications open on a specified 
desktop?  For example when clicking a desktop or panel shortcut to have 
thunderbird and firefox always open on desktop 2 which I have renamed 
"web", and shells and yast always open on a desktop named "admin". 

Plenty of info on google about virtual desktops but I just can't seem to 
find what I 'm trying to do.  At this point I am assuming this is 
possible.  Can anyone point me in the right direction?

Cheers,
Roger