>When I made my setup disks in VFP 5.0, and I try them, the setup gives me the errormessage "Error 280 in Object 9, some setup file may be damaged".
>
>I tried to remove the distrib directory and the wzsetup.ini-file. I tried also to reinstall VFP, But no succes

That's due to a long file name in a file which requires splitting in the setup process. Try shortening some file names to 8.3 format.