How to make non-Leopard Mac Display Proper Icon?

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In Finder's Network view, any Macs running Leopard display using their proper computer type, and any running Tiger or before use a generic ACD image. Is there a way to make the icon show up properly, short of changing the "generic Mac" icon (which I figured out how to do)?

 

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I am going to guess that it won't work, because they added something new to Leopard to display those.