Thread:Randomouscrap98/@comment-24945049-20140609051852/@comment-9531161-20140609053823

Screenshotting is going to be different for every game. I can go over the basic concept, but I'm not going to be able to write a general "Screenshot" routine for you. It all depends on what layer you've placed the sprites, what priority the GRP has, how the BG layer comes into play, and whether or not all the colors on screen can be represented in a single GRP. Honestly, the work required to get screenshots to work usually isn't worth it; you might as well just take a picture of your screen (especially when it's something like DOS).

As for the pictures not uploading, I can't really help you there. I'm sorry, I don't know if Wikia is just being dumb or if it's something on your end. If you can't upload pictures into a page by using the "Add a photo" button, then you might be able to upload them from the "Photos" link up at the top (in the tab "On the Wiki"), then use it later in your page.