orchestral software

Hi. Do you use orchestral software? What's good to use? How do you set it up? Doing a spec commercial demo for a luxury car commercial that needs orchestration.....
Idea - start with a theme on acoustic guitar - that's built up and enriched with orchestra instruments.....

Thanks Brewer

Found this: VSL 30 day free demo Vienna Symphony / VSL - review

Vienna Symphony is the way to go, it's somewhat pricey though.