How to extract a CEFS partition efs.mbn?

When Customers need to create a factory image for production phase, usually they also want to include specific contents into the file system. To do this, they need to extract the CEFS as a partition (i.e. an efs.mbn file) and then create the factoryimage including this partition in the layout.

To extract the CEFS from phone two things are required;
1) QPST Software download 
2) Enable these features in custefs.h and recompile the build again 
#define FEATURE_EFS_NAND_FACTORY_START 
#define FEATURE_EFS_ENABLE_FACTORY_IMAGE_SECURITY_HOLE 
#define NO_DOG