There are 2 ingame icon - ball when smth is loading and cursor.

Download programm restorator (i downloaded that from torrent), so i dunno how to get it in legal way
open cm0102.exe in it
go to folder cursor: there 3 files ther 101, 103 and 105 - click on it to see what it answers for, for example i want to swap ball icon - so i right clicking on "105" and press "assign to", and choose ur bmp or .cur*** file

*** - better to use .cur file coz bmp isnt transparent