Yeah, that Dropbox link 404s for me too. But you can still find the SP installer on the page I linked a few weeks ago, or directly:
http://hsscoring.com/download/NFS_HS_SP_Installer.zipI just noticed that the version FM tried to link is supposedly newer (v3.0 beta), but I don't know if it makes any difference in relation to the new 3dsetup
When you run the installer, don't be confused by all the options you get, many of these are aimed at online racing, but you don't necessarily have to install all of them if you only play offline.
If all you want is to try out the new 3d setup, just uncheck everything else:
(I just tried this myself and have been getting 1mb errors, so I'm gonna run it again to apply the fix for that. I like about this installer that you get a free choice on what you want and don't want to use.
)