Hi
It's similar to the method for CallManager - it uses the same format graphics files, same list.xml file, and same location in TFTP:
http://www.cisco.com/en/US/products/hw/phones/ps379/products_administration_guide_chapter09186a00801d66b9.html#wp1088046
Things to make sure about are case-sensitity (doesn't matter on a Windows server, but on the router it will), making sure you get the files in the right place in flash (i.e. the full path as in the link above), and making sure you put in a tftp-server command for each file as you do with load files.
See this thread for more help if you get stuck or post back:
http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=IP%20Communications%20and%20Video&topic=IP%20Phone%20Services%20for%20End%20Users&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.1dd7478e
Regards
Aaron
please rate helpful posts
Aaron
Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!