Is there something like IIS 6.0 Resource Kit Tools for IIS 7, specially the metabase explorer tool to be able to edit the IIS configurations without editing the .xml and .config files directly?
You can use the Configuration Editor built-in IIS 7.5 (Windows 7 and Windows Server 2008 R2), which can also be downloaded for IIS 7.0 (Windows Vista and Windows Server 2008) from http://www.iis.net/download/AdministrationPack
(See the video in the URL above, minute 1:25 shows the tool).