1. open your skin folder.
2. locate cursor.png, curstrail.png, and cursormiddle.png (if you use one)
3. drag them onto GIMP (so you get the original canvas size)
4. edit them as you wish, overwrite old files and experiment with it to find the best cursor you can make
note:
- cursormiddle.png is located on the center of the cursor (it's not rotating)
- depending on your skin.ini configuration, the cursor and cursortrail may rotate as well
- cursortrails helps make the cursor more visible
- you don't need photoshop, I'm a pure gimp user
- make use of the useful tools and built-in scripts for gimp. there's a lot of ways to make something, depending on how you want the cursor to look.