i've recently been looking for a ps2 flip top cover. I've looked on some websites and notice that they say you need to have a flip top that's compatible with the version of ps2. Why does the version of the ps2 matter? also, anyone know why there are different versions of the swap magic boot disc? I have v3.3. i have seen 3.2, 3.0, 2.0, etc. Why do they keep updating it?