Thanks Rich,
I had all kinds of problems trying to install SheepShaver and finally gave up.
I use Mac-on-a-Stick - which is wonderful (and, as it's on a memory stick, portable) but has one drawback for me... the 'screen' is too small and I can't make it larger.
I just thought there'd be no harm asking.
£$%^&* - if my copy of Parallels can let me run Windows XP and Windows Vista on my Mac, why can't Apple give me _something_ which would allow me to continue running heritage apps! I've been using HyperCard since the late eighties and still find it incredibly versatile.