I have been trying install_us too.
It registers all dll's and ocx's properly.
But VFP6...dll's do not need registration as i found.
It gave me a problem because on my developping machine i use drive D: as windows drive.
I finally decided not to copy the VFP6..dll from my machine but from a seperate setup dir in which i put them all.

The runtime files not found error was gone....

Albert