From Adobe's site:
"No updates to FreeHand have been made for over four years, and Adobe has no plans to initiate development to add new features or to support Intel-based Macs and Windows Vista.
To support customer workflows, we will continue to sell FreeHand and offer technical and customer support in accordance with our policies.
While we recognize FreeHand has a loyal customer base, we encourage users to migrate to the new Adobe Illustrator CS5 software which supports both PowerPC and Intel-based Macs and Microsoft Windows XP and Windows Vista.
Illustrator CS5 offers powerful new features, including functionality designed to appeal to FreeHand users, such as multiple artboards, the Blob Brush tool and transparency in gradients.
FreeHand customers can switch to Illustrator CS5 for US$199 (volume licensing also available), and access complimentary resources to ease the transition. For additional information, please visit www.adobe.com/illustrator."
<http://www.adobe.com/products/freehand/>
It's done. It's gone. If I were you I'd do one of two things:
1 resign myself to having an old PPC Mac running the last version of OS X that will run on PPC, 10.5.8, and using that to run Freehand, knowing that sooner or later Adobe will drop all support for it and the longer I keep using it the harder it will be to move to something else;
2 move to something else as soon as possible, to minimise the pain. You don't have to move to Illustrator, although Adobe would prefer it if you do. You should move to something which is currently supported, though.
Those appear to be your choices. Pick one. There is no 3rd choice.