Thanks for that link.
I don't want to use a frameset. I want it to be that when someone visits www.mysite.com/somesite/index
that when they arrive at the page, it shows www.theirsite.com/index
Nothing naughty. It just means I can host some clients sites as a sub domain of mine bit that when people view their site, they see it as being their own site.
My domain registrar offers it as a service so it is do-able. But I want to offer it as part of my package.
I see you are as nocturnal as I am