Hi Henry
If I was in your position, and I needed to make mass changes to the pick sequence field by location, I would use a utility program called Zippy Import which works with the ACCPAC Plus (DOS) version of Inventory to do the trick. However, you may not have migrated from ACCPAC Plus, and you may not have Zippy Import, which is no longer for sale.
If this solution appeals to you and you don't have the utility program, you should contact your Adagio consultant to see whether he/she does. There are many of us who still have those tools in our kit.
If you want more details on how and why this works, please reply.
Steve