David, under the [CLASS] heading, the line for WPFolder needs to be updated to point at your icons. Currently, it shows:
"WPFolder" "folder.png", "folder-open.png"
It should be:
"WPFolder" "folder_closed.png", "folder_open.png"
Also the top lines are mangled. Currently, it shows:
"templaPOPUPte" "view-pim-notes.png"
It should be:
[SYSTEM]
"template" "view-pim-notes.png"
Final note: if you don't have a PNG for something, remove its entry. It's just clutter that slows down the lookup process.