We leave the ip address field blank. The installer looks for fogserver by default. Regardless of the actual server name I put an A Host record in my dns server to point to fog. This has solved tons of problems for us.
There is a GPO option for this with Win7 clients but for those of us with large fleets of XP boxes out there this would be one tool that I’d like to use. We have a large number of multiuser PCs and having FOG delete accounts older than X days would nice. Even deleting all profiles every 90 days would work.