How do you install Masuzohs files

I haven't used his files before and they don't come with any instructions at all, just the single file so using wadupdater where do you install it to?

I put the file in a folder (Minardi Trust for example) and update it to cars.wad but nothing happens, even though I have Bojans Minardi already in place.

Do his files not work with wadupdater?

Oh and the same thing with Berger Fans steering wheels too, I simply can't get them to work.

Any ideas?