I registered a new domain, but I do not want to set up its own account. Instead I want to direct all traffic going to that domain to a subfolder of another domain.
Oh, you never said that. You can’t do that (easily) with server configuration. The best you can do is frame the other site (plain old HTML <frameset> tags). The original domain will stay in the address bar, and will not change even as links are clicked, even as links to other sites are clicked, and nothing will be bookmarkable.
Aw, I see… So basically what I was trying to do is not even possible. Thanks for letting me know; I might have ended up spending hours trying to figure that out. I guess I’ll just be using absolute URL’s. Shouldn’t be a problem.