I came across thi interesting website today.
The guys over at VOiP Integration have created some great looking software that will help admins to deploy the background image files to all Cisco IP Phones. This is one huge feature that Cisco is missing with thier current Call Manager offering. Currently admins would have to visit every phone and manually set the background on the phone, now there is a way by using this product from VOiP Integration. Using the AXL account to manage the phones, this software can push out commands to load new IP Phone backgrounds. Really this should be a default tool within the Cisco Call Manager. Who knows, maybe Cisco will include this in a later release.
Anyway head on over to their website and check them out.