This query is way over my head, personally, so I can't help you with followup questions unless I get them from the source.

My friend Jim is designing an app for a WinPhone that will present information from a URI on the screen. His prototype pulls information from the following XML file:

He's a bit at sea. Here's his question:

[H]ow do we display thousands of items in a navigable way on a 3.7 screen? I tried a carousel control, but its not a very satisfactory solution.
If anyone has any ideas, please let me know. And use small words, this stuff goes way over my head.