Hi Al -
FCE seems to be working well with Snow Leopard, and I got a lot done today, just to give them and me a little workout. Stable so far, so I am optimistic this will do the trick.
QT is another story, and not even really a problem (yet). V 10.0 (128) is what came with SL. I did buy the Pro upgrade years ago for the QT that came with Tiger, because there were things I wanted to do that I needed it for, don't remember the specifics. I'd do it again if necessary. But I don't want to install a QT product that is too advanced for my brand-new antique OS!
It's definitely a new question. Watch this space...
And thanks again for your help and advice.