Click on the Gallery tab at page top
then click the Cursors link
and then the Upload link.
(Gallery > Cursors > Upload)
When you have finished uploading your cursors click to Create a set near the page bottom,
(or Gallery > Cursors > Create a Set).
You must be a registered user and log in.
Here is the link to the cursor upload page.
http://www.rw-designer.com/cursor-add
The same is true for uploading of icons except that you would select Icons rather than Cursors in the links.