Disaster Recovery

I want to add an option to an app that I'm writing so when the user says: "Create disaster Recovery Disc", the program will take a snapshot of the source drive (may be sector by sector) so that all files including OS files, and boot sector & registry info are copied onto the disaster recovery disc. This way when the Source disc crashes, the target can be used as the primary drive.

Any idea how this can be done?

I would ask Peter Norton about his Gost.
;-)

I think you will have to code in C/C++ in this case.