Dream Explorer is an ISO to burn for your Dreamcast. It let's you edit loads of things, like VMU default images, Compress saves on VMU, Defrag VMU and a lot more...
Are you near sea/salt water, or in general they just don't last. Sounds like if you driving a mercedes, you need a garage. I get snow n ice here so nothing worse than clearing that shit off at 6am rushing to get to work.