@Bob – I had some issues open up INX files or even IDML files from older InDesign versions. Cannot test, if INX from CS2 will move page objects around like my tests with CS4 showed with a specific constellation of master pages applied.
Here an example showing the pages (no error) in InDesign CS4:
Here the pages out of an INX from CS4 opened in CS6:
Maybe you could build a test case and look for yourself.
Tried both of your suggestions:
Opening from the hard drive and it still stalled up....
And we plugged in one of the old computers with cs2, and strangely those files loaded slow in cs2 now as well....\
so.. the problem must be with some of the fonts and pics linked back to files on the network I guess??? I don't know, this is so frustrating! (but thanks for your help!)