For my sins I'm still using SetupBuilder 5.6, because it works like a charm
and because I've not had the time to spend investigating SB6. Now I'd like
to jump up to SB6.9, however I've some questions:

Firstly, can SB6.9 run alongside SB5.6 quite happily?
Secondly, can SB5.6 scripts be opened by SB6.9 and just compiled?
Thirdly, is there a foolproof way of code signing my app within SB6?

Many thanks,

Colin.