I don't use VB5/6, but I need to fix this installation. Searched the MSDN, not getting anything.

It's using this setup.exe (Setup Bootstrap for Visual Basic Setup Toolkit) and a CAB file. It's currently started from a vbs as - shell.run "setup.exe",1,True - but I'd like to start it from the commandline. The obvious /?hhelp options give nothing. Can anyone help translating?