[wst_]

I've been doing something similar but in the pursuit of graphics assets. Typical ZX Spectrum game was usually one blob of bytes containing everything it needed to run. I'd load the main game block into memory and run small assembly routine displaying a fragment of code on screen in a form of a window with dynamically configurable width and height. You could "slide" the window throughout whole memory block, which was quite fast, and eventually you'd find out something resembling backgrounds, sprites, fonts. Often they were of different dimensions, hence the dynamic window size. After few tweaks you'd find the offset and the size of assets and you could replace them easily. I'll never forget the Rocky Horror Show play-through with all the characters replaced with their other, rather obscene, versions. Well, not so mature when you think about it, but quite funny it was back then. If anything I've learned quite a few tricks about fitting a lot of assets into very limited memory.