You could google for windows cursors. Then you set them in your mouse settings. I don't know if you can pick anything larger than extra-large cursors though (try Windows Default Extra-large to get an idea of how big that is).
An articles with more details:
http://pubs.logicalexpressions.com/p...cle.asp?ID=234
If you're unable to find .cur files you want, there may be programs to make your own cursors (I know there are programs to make icons - even from bigger pictures - not sure about cursors though, esp animated ones).