This program released by SWAT some time ago, allows to change the default region, language and video signal on a Dreamcast console with just some minor hardware modifications.
In this new version, there are a couple of added features involving the Flash memory: making a backup of its settings on the VMU, and clearing it.

According to a post by Oyster at the DCIberia forums (based on the original russian manual); the hardware mod simply requires soldering a wire from the R512 resistor to a +12V contact, and then making a solder bridge where the R422 resistor is missing.

Get it at DC-SWAT (or translated via Google)

For more info, check this forum thread