BF2S Forums Trojan.Downloader.Interkey

Those jpg's are the cached sponsor server logos that appear in the bottom right corner when loading up a game.
A JPG shouldn't be able to hold a virus/trojan, it could just happen to contain the signature of that trojan through pure randomness. It's possible that it is in fact an exe file renamed to a jpg, but I doubt it. Personally, I wouldn't be too worried, especially since that image has come from what looks like an official EA server.