ok dude when u get a render off of a website... wut u do??? like how do u get jus the image and not the white background..???
You have to copy your image onto the sig/banner or whatever you are making first then delete the outside of it
Right click, copy, then in PS, edit -> paste or control V, and then get the magic wand tool. Click in the spots around the render, it takes out all pieces of the same color so it will do it nicely.
you hit yourself in the head for not setting the Image Mode to RGB channel newbee mistake... (notice I didnt say "noob", there IS a difference) btw, check the GR Starterskit in the Introductions section (link in my sig)