You work at Cisco and you have nobody to tell you? Strange...
There's the IP phone service documentation and SDK to get you started.
CME works but you can associate one page to each phone via CME config.. you don't have the whole service management like on the Call Manager so that page you point to has to serve as that and you have to build the service management pages on your own.
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.