How can i defrag the registry ???????????

Hi All

i want to take a backup of registry, but not with command because  i also want to defrag the registry , but when we considered the registry files they can't allow any manipulation on them , means you can't access them nor delete , nor cut ,copy etc so how can i defrag or take the backup of these registry files.

how can i  implement programmaticaly in MFC , i dont want the tool to defrag the registry , i just want the idea how i will
take the backup & defragmentation of these registry files.

if iam not wrong The following Registry files are stored in %SystemRoot%\System32\Config\:

    * Sam
    * Security
    * Software
    * System
    * Default
    * Userdiff
    * NTUSER.dat

Thanks & Regards