One of things I use fairly often is the unattended install scripting in SQL Server. I like to know that all my servers are built exactly the same and configured from installation identically with the same install paths, service accounts, and startup configurations. While installing SQL 2008 RC0, I noticed the following screen:
The path at the bottom is the ini file that the installer generates to run setup. This means that you can use the installer now to generate your ini file, and then do any remaining customization required which upon review seems to be minimal.