I am trying to set up a test version of our current Sharepoint setup.
I have created a test database server (SQL) and restored a copy of all
our Sharepoint databases to this server. I have also created a web
server and installed Sharepoint portal server and WSS on it. Both of
these servers plus a domain controller are on a separate network than
our live system.

I am not sure what I need to do next. When I enter the web address for
the Sharepoint site I get the 'Under Construction' IIS page. For some
reason IIS cannot link with Sharepoint.

Previously when I recreated our Sharepoint site to recover a file I
loaded all the databases except the config database. Then I did
a 'restore portal' using the three databases to create the config db.
When I try to do this in my current situation I get the following error
"A portal site already exists with the same ID as the one contained in
the database."

Has anyone else tried to recreate their Sharepoint setup before and can
give me some insight on what I'm doing wrong?