>I downloaded it but could not understand what is if for.
> Can I use Visual Installer 1.1, to install my VFP6.0 exe, into
>my customer computer ?
> Where can I find documentation about it ?

See Using Microsoft Visual Studio Installer for Distributing Visual FoxPro 6.0 Applications at http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfoxgen/html/usingvsi.asp.