Add custom cursor to forum and links mouse hover cursor
 

Note: This mod is for 4.2.1 (tested and works)
I make this cause in this thread Lynne say the mod not work to 4.2.1

What this mod do?
Simply customize mouse in all forum parts and when your mouse go on a link.
Browser compatibility (tested on): Safari, Firefox

Steps:

Access using ftp to your forum
Make a folder on your root call it: "cursor"

Upload the two cursor you wanna use one for standard mouse and one for the mouse hover.
In the example below i call them normalcursor.cur and linkhovercursor.cur, you can use the name you want.
The cursors must be in .cur extension.
I don't test other extension but you can try.

Open additional.css in your admin cp - styles.

Copy this code and change the red parts with name of your cursors