The Space Marine is actually myself, that's why he looks young. I go by "Captain Ventris" everywhere on the internet. It's even on the back of my Letterman jacket! He is the main character of the Ultramarine Novels. It's set as my background, and my the Background on my Mom's laptop. XD I'm using it pretty much everywhere I can, haha.
uh...ok, i think i confused the DPI with the actuall resultion in hright. I scan my image at 300 DPI, then i shrink that image down a resolution where the height (in pixels) of the image is multiples of 128 (usually 512).