Torpoleon: You would have to resize the original pic, split it to images under 40K pixels if needed, then you may put that other pic in your sig. Otherwise, I can't think of another way. D: Dark Eevee: You're fine as long as the sprites you used on those banners are made by you. Otherwise, give the proper credit(s). Double-oh-Platypus: You should split your Terriermon banner. It's over the 46800 pixels for a banner.
kyuusou: it's fine if you made the sprite assembly thing.
electricbluewolf: yeah it's too big and is gonna need to be split.
rosemary: you have four images, one needs to be taken out.
BUG: it's much too large.