Volcano Man updates available for downloading

[Outlaw Josey Wales]

I keep getting compressed file invalid or corrupted. I downloaded all of them to a file where I keep each title with it's own scenarios and updates, then extract from there to the actual title. When I went to extract to each title, I got that message. I then went to open instead of extract to possibly copy or cut and paste and got that message. I then went back to his site and tried to open the file there and got same message. Any ideas?