If someone were to create drop-in relacements for any or all of his scripts and send them to him, I think that he would be more than happy to replace the ones on his site, and give credit where credit is due.

I doubt it. His scripts provide him with plenty of work from people trying to deploy them. If he fixed them, there'd be alot less work. Frankly, if I were him, I'd be embarrassed to still display them without a large, loud, disclaimer of "Here's some stuff I wrote when I was still in diapers. It needs alot of work to be usable, and I don't actually recommend using it."