if he'd tried it, no further explanation would have been needed
Anyhoo, worth adding, if you've not discovered already, that using this system, you can still add other tags to the tag window via right-click > also show...
What happens there, is that the tags that match the selected columns remain at the top of the list, and the "also shows" are placed in alpha order below them.
we owe a "thank you" to lalittle's persistance for this option.
Thanks Larry!
Happy tagging jb. (if you keep on tagging images with build 120, remember to do an "update tags from library" on your files once the iptc writing is fixed in a future build)
-marko.