How about using internal Webkit and Mozilla cursors and .cur only as fallback for IE?

Something like for openhand and similar to closehand
```CSS
cursor: -moz-grab !important;
cursor: -webkit-grab !important;
cursor: url('openhand.cur');
```

Cursors
http://www.sitepoint.com/css3-cursor-styles/

Just thinking of retina displays and how the cursor looks like ;)