[Editor's note: Adobe has listened and made it easy to use Freehand under Snow Leapard Mac OS 10.6. Follow earlier procedure in this post but with new registration file from Adobe. Thanks Curt!]
[Adobe now has released] an official solution you can access here:
This is a Freehand registration file you replace your own copy with. This will bypass the activation component which causes the crash on Snow Leopard. Please use the above link rather than relinking the file to the forum since we are tracking the number of times documents get accessed to give us a and idea of the scale of particular issues.