Installation problems

I am having trouble installing this. I had Fusion for years on an old XP computer with wamp, I am upgrading to a new windows machine with wampserver. When I browse to the installation directory, I get a 404 error. I modified the .htaccess file to reflect the rewritebase directory (my content is under /www/working). I’m sure I’m just missing something stupid. If I can make this work, I believe there is some possibility to save all of the data from my old fusion db.