fortunately there were also several e-mails warning against it before I could open it!
If the virus writers really wanted to wreak havoc, they'd use a fake message header warning about virii.
FWIW, David Harris, the developer of Pegasus, has kept the product as freeware. He only requests you buy the manual ($20) if you find it useful. I've actually done that. Other than using Pegasus since I started using the internet at home (1995 or so), I've got no stake in it.