Look in Particular for the min names I spout off in the next episode, such as Bohemian and the Palatinate. Look at Bohemia, seems simple right? That's because Bohemia has the fortune of being an actual kingdom, so it doesn't look like a child attempted to draw it into a map of Europe. Now look at Mainz. This Electorate is a vital 'state' in the HRE because it provides one of the votes during the voting for the next Holy Roman Emperor. But look at its lands. See that pink in the HRE with the words 'Elect. of Mainz' written across it? Well follow that pinkish colour southwards aswell, because it pops up in little bits all throughout Austria. Now you see my dilemma; if I was to tell you where Mainz actually was, I'd be describing Austria's location!
Anyway you get the idea. Here's a few maps that'll hopefully give you a better picture of the HRE geographical situation.
And this one, a little more city-oriented:
Finally, Here's a handy link to a map of the HRE that you can really zoom in on. It's from 1789, but still.
Hope that clears up some of the confusion for you history friends, WDF 25.3 out soon!