How do you upload at site limitation size but get a higher resolution view when you click on your original chop?
You may be thinking of what happens to members entries. With membership the original is larger, your entry is larger, and you get the originals a month ahead.
Now I have seen some nonmembers enter their image then under comments tie it to a larger version posted at Photobucket or other off sites which don't have the size limits they have here. I have also seen that done with gifs, animation with larger k value then the accepted norms.
Hope that helps.