In ubuntu 11.04 how to change the cursor(mouse pointer)

If you use compiz, you must do those steps to install any mouse pointer yo find here:
http://gnome-look.org/index.php?xsortmode=high&page=0&xcontentmode=36

1. Download cursor pack.
2. Extract it as root to /usr/share/icons
3. Edit as root the index.theme file located in usr/share/icons/default
4. Change the line Inherits= to the name of your new icon theme