You need to enter the URL you will be using for the test site - if it's an IP, then http://123.456.789.123
But if I do that to live, won't I break the live site?
--------------- Added [DATE]1379616805[/DATE] at [TIME]1379616805[/TIME] ---------------
And on another note, could I just go into the database and update the datastore table under options value and replace anything that had the live forums domain name with http://123.456.789.123 ?