The phones basically behave the same as with CM - so you need to create the same files (PNG thumbs and images, and the List.xml) in the same folders on your CME system.
You need to create the folders on the flash and copy in the files as with CM (I think it's also more sensitive about case than Windows).
Also you need to put in
for each file, including list.xml.
to allow the router to server them up.
Do a debug tftp events to see what the phone requests when you enter the background selection menu to see where it goes wrong, I've done it once and it was quite fiddly... Also I can't find the config at the moment...
Give it a try, see how you get on.
Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.