A few years ago, I found out a funny little glitch on the TI-Nspire that lets you use the mouse cursor in My Documents. I forgot about it till recently. I've tested it on systems 1.2-2.1, and others have tested it to work in 3.0.
Here's how to do it.
Step 1: Make a new document (don't save it).
Step 2: Add just a Graphs & Geometry.
Step 3: Switch over to Plane Geometry View.
Step 4: Open "My Documents" while the unsaved document is still open.
Step 5: Delete "Unsaved Document".
Step 6: Press [Ctrl] and [Z] to undo the deletion.
You should now see the little mouse cursor on the Documents screen. You can move it around and click on things.