Dale,
We did nearly the same thing with our message.? BUT, I had spend nearly 8 hours+ scrubbing out the Yahoo Ads, SPAM, porn postings, and odd HTML-5 characters from the message archive.?
I had then saved the messages into an HTML (takes 3mins on fast connection for 31400+ messages to load).
The spread sheet formats open very quickly otherwise.? These are also saved to CVS, then to OpenOffice .ods and finally Office 2013 extended excel format .xlsx
This way, one can filter, search and literally pin-point exactly what they need in seconds.??? Our groups is the 2nd largest tractor membership over there with a combined membership over 4,100+ folks.?
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Our group is very old from Prodigy to GeoCities to Yahoo and now Groups.io.?
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PGOffline helped out greatly.
?
Bret
BMaverick