Macrium Reflect (Free) - Possible to write an Overwrite Command?

[Clive]

The partition which has my MR images will hold 5 images. Would it be possible (and if so how) to write a command which would tell MR to overwrite the oldest image when the partition became full?

Thanks.

P.S. Does anyone know of an on-line primer for learning about creating run commands?

Thanks again.