Yeah! You're right, On HxD is difficult to arrange the Ascii to see in right order. This example of Road Rash, above the cars (aligned), there are the bikes (not aligned) and I think have seen track turns and objects
Graphic editors, I´d tried a lot of them, including YY-Chr , but the one that I have "more knowledge" is Sonic Molester(a version of Tile Molester already configured to open Mega Drive games) , but at times messing with Columns/Rows to see the image as it was in the game is painful ...lol But when you figure out after trying 1000 combinations it turns easy.
Super Monaco GP compressed images I´d successfully found and decompressed with tools, but EA's games I think that we don't have such a tool to do this.