Quote - *...*I have hundreds of files built in Bryce 1 and 2 that I can no longer access because Bryce 6 -- or 5.5, for that matter -- cant read them.

You should be able to open from .br2, up to and including, current install version by using the file type pulldown menu in the 'open file' navigator.
I have opened some of my older Bryce files in 5.5 and 6.x already, for nostalgic purposes :)
I don't have B4 or earlier installed anymore.

Friends don't let friends use booleans.