I would strongly suggest install newest version last and keep the default
open in newest version. In the registry 'CurVer' exists in a number of
places which overrides the file association for 'Open'. I wouldn't mess with
it.

When you need to open in the older version, keep only that version already
open and double click from file. It should open in the running instance,
whatever the version (subject IgnoreRemoteRequests).

If you need both versions open, drag the file into required version, or File
/ Open.

Regards,
Peter T

"Krash" wrote in message
ups.com...
My bad, I meant testing on a single PC. Just a stand-alone PC that is
used sometimes, but when it's used, they should be using only 2002
(not 2003). Sorry for the confusion.