Too Short

Back to nightshift work on the short. I've just spotted the upcoming Rushes Soho Shorts Festival; also just noticed the 5th May submission deadline for entries! Is this movie going to make it? It'd be very nice to get this film out and hopefully get it picked up for some screenings.
I'm mostly happy with the picture now, but the soundtrack needs work. Here's the problem... the soundtrack is a piece of music I composed using Cubasis VST 4.0 around three years ago. Since then I've changed my PC and now also moved house. I now can't find the Cubasis cd-rom!
So I've got old cubasis files (.all format) that I need to get into to modify the track to fit the picture... Cubasis seems to be obsolete now according to the Steinberg website and I've no idea whether my Cubasis VST 4.0 files would be usable in any current version of Cubase. Any ideas/suggestions would certainly be most welcome.