WordPress to SubDomain?


I’m moving my website to Dreamhost, but doing a complete redesign, using WordPress. Since I want my old site (hosted elsewhere) to stay up and running until I’ve got the new one built and ready to go, I followed these instructions: http://wiki.dreamhost.com/DNS_-_Viewing_site_before_DNS_change and set up a mirrored dreamhosters.com site.

Now I want to install WordPress to my subdomain, but I’m being told that I can only install it to a fully hosted domain, aka my “live” domain. Obviously I’m missing something here, if I can’t build my site on my subdomain, and yet according to the instructions above, that’s exactly what I want to be doing. Help?