Thanks Bearcat, I'll have a hunt for this - just in case! If I find it I'll post it.
Found it. There's an updated version, COA2, described at
http://www.pcmag.com/article2/0,4149,21277,00.asp
You can't get it from PC Mag without a subscription
but it is also available at
http://www.wlcweb.com/newsletter/software/coa2.zip 