is difficult because Corel did not release any versions for the Mac platform during the era when Snow Leopard was the current operating system. CorelDRAW Version History for Mac CorelDRAW 11 (2002):

Your safest target is CorelDRAW Graphics Suite X3 (version 13) . This version shipped with a proper Mac installer that checks for OS X 10.4 through 10.6. It does not require Rosetta (though it can run on it) and will launch natively on your Snow Leopard machine.