IIS server: how to dump IIS configuration into a single file
IIS7's configuration data is stored in a bunch of XML config files in:
%SYSTEMROOT%\System32\inetsrv\config
There are still some settings that are registry bound and they can be found under:
HKLM\Software\Microsoft\InetStp\Components
and
HKLM\Software\Microsoft\WebManagement\Server
The approved way of backing up IIS7's configuration is by using the APPCMD BACKUP command. You can find out more about this command by running APPCMD BACKUP /? from an Administrator command prompt.
You can find out more about APPCMD BACKUP here:
Getting Started With APPCMD.EXE - Managing Backups