I've figured out how to get pictures on there, but still can't figure out how to get replays on it. I even looked in the replay theater and it doesn't say anything about saving onto a USB storage device.
thats because it isn't possible, the replays are only recorded so the ps2 can read and replay the data, not a computer, if you wish to get your replays onto computer/internet you will need a capture card, try searching it as i dont really know how they work etc.