One need to perform below mentioned steps to take backup of IIS 6.0 Metabase Files:
1) Open IIS 6.0.
2) Click on your computer name and select all tasks-> backup/restore configuration.
3) Click on create backup.
4) Now you can make up any name you want, not including dots (.) You can also password protect the back up if you choose.
5) Click on OK button to complete the backup procedure.
Backup is stored in C:\WINDOWS\system32\inetsrv\MetaBack under the filename which one has given. There will be 2 files. In the example I gave above 2 files were created: