Well, you may be happy to know I made a little progress today:
The breasts and nipples are obviously placeholders and not close to meeting my standards, as I was more focused on making the lower body area look clean and consistent, in addition to also figuring out where the heck each sprite was located in the files. You see, all of the sprites are split into 47 different .png files when I decompile the game's data, and half of them look similar to this:
Not all of an animation's sprites are in one file, either, meaning I had to sift through every single one of these 47 files and play Where's Waldo until I found and edited them all. The above animation, for example, had sprites located in 9 different files, with roughly 1-4 distinct sprites hidden in each one (meaning I had to locate and edit roughly 22 or so sprites for that animation and its fast pumping/cumshot stages). It made things even worse when I ended up missing some of them and recompiled the files, since that meant I had to go through the search process again and hope that I remembered to make backups of my edited files - as I said earlier, the recompiler won't work if the files you're putting back in are larger than the originals, and the method I'm using to compress the .png files can't be used ad infinitum on the same file.
The best part is that it took at least an hour and a half for me to do even this much. I don't know how interesting this is to the average person, but I felt like it'd be fun to share how I'm trying to do this, as I have no prior experience with editing game files; plus, if someone knows of a better method of going about it, I'm hoping they'll give me some pointers. From now on, now that I managed to mostly complete one animation and confirm that it could be done by editing the files as I have been, I'm not going to focus on one specific animation and instead go through each image file row-by-row and edit every sprite that I'm interested in, meaning it'll likely be a
long time before I share my results, but it'll save much me more time overall than if I had tried to keep doing things the way I did and focused on one animation at a time. Wish me luck! It may take me ten years to do it, but unless someone else decides to one up me in the meantime, I'll make sure to finish it.