1 - Have the same problem right now. It kind of depends on if the old table is still being updated or used by other applications. The best solution would be to retire the old table and put it's data into the new format; tho I fully realize that it may not be possible if other system rely on its format. Consider creating a VIEW that UNIONs the two tables together.
2 - I really don't see much issue using the Equipment Number as the PK since it's a single field and is unique -- you're probably going to create a Unique Index on it anyway.
3 - Same answer as #1 -- create a VIEW that makes the old format look like the new one and UNION ALL the tables together.
__________________ Wolffy
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