Well, hello to you too.
It's a real shame about those old maps. Its funny to look at stuff you might have created years ago. Sometimes you happen upon something you don't even remember making, and it brings back all sorts of great memories. Oh well...
If you have no experience with general graphics applications like Photoshop or GIMP, and especially if the maps you're making is for gaming, then I'd probably recommend Campaign Cartographer. I have never played D&D or even tried Campaign Cartographer myself, but a lot of people here use it and it can make some pretty nice maps. And I think its fairly easy to use, so it doesn't take too long to whip up a decent-looking map. But more experienced people could probably tell you more about that.