Make a file named autorun.inf in the HD's root using the DOS edit.com or whatever.
Now write:
[autorun]
icon="%path/%icon-name.ico"
Replace %path with the icon's path and %icon-name with the icon's file name.
I made the HD icons according to the subjects my partitions are split by. I didn't have many ideas, so send me any requests you have for other HD icons.
Any request, suggestions, comments can be sent to talsella@yahoo.com.