http://www.starcraft.org/downloads/goodies/desktopembellishments/StarCraft Cursors
http://www.custom-creations.org/~starsite/programs/BW1.zip
http://www.creepcolony.com/starcraft-cursors.zip
1) download. These three links have SC cursors that the others don't have. once you download them, simply unzip them, and the cursor files will be there.
2) go to control panel -> mouse -> pointers. at the bottom, click the browse button. Find the address to the folder and sipmly cut and paste the unzipped cursor files into the address. (default address is C: / windows / cursors.) You can open a new window when you cut and paste.
3) then select the appropriate individual cursor images for each mouse status, using the browse button. You can save the theme as "SC/starcraft or bw"
=)