Hi, Welcome Rider66, and thanks for wanting to contribute to the collection. I appreciate that you're trying to do the right thing by getting the original author's OK. But yeah, most of the time such email accounts aren't valid anymore, and the 'exclusive to a site' factor alo doesn't really hold anymore I think, if that particular site stopped existing long ago.
If you've got the original ZIP archives, readme's and all, then I'm not stopping you from uploading them here. (If only because I'm a fan of vintage American cars myself
) If you're unsure if a zip is original, then I can look in my own archives and see what I can find.
The 55 T-bird by MH is already here, though:
http://www.nfsaddons.com/nfshs/cars/Ford/211/Only ones I'm not sure of is GroundShaker/JokinenDesign's stuff, because he DID have his stuff hosted here in the past, but then after a few years he asked me to remove it all. So I did, although he never gave me a reason why.
I admit I'm not too sure what the 'right' thing to do is in this case...