As I said before, your CS5 experience and installation have nothing at all to do with CS6.
Crashing can be casued by a lot of different things, and it's easier if we ask YOU to tell us what might be running that we've seen to be a problem than to give you a laundry list of known and suspected conflicts.
Check your fonts. Bad fonts are the number one cause of program crashing in ID, but they are hardly the only cause.
If ID closes without saving prefs you have a permissions issue. If it crashes there's no way to save the prefs.
You're welcome.