I don't suppose a mod could move this to the dreamweaver forum, I was busy reading a pile fireworks stuff and posted in the wrong forum, Sorry people
In Dreamweaver, go to Edit > Preferences > File Types / Editors and edit filetypes that you would like to be opened / edited with Fireworks MX 2004. There are a lot of options available there, and this should do the trick.
There's even an option to specify the path to Fireworks, like:
C:\Program Files\Adobe\Adobe Fireworks CS4\Fireworks.exe
-- just edit it to match where your copy of Fireworks MX 2004 is, and you're done -- I suppose that in your case, it should be here:
...but I might be wrong -- it's been a long time since I installed anything older than Fireworks CS3...
Hope this helps!
Thanks Michel, that solved my problem
Cool, glad it worked!