Hacking I really don't get the SD Menu

[harrybuttox]

Okay what I thought it was exactly is that you could load the game from an SD card without using ANY system memory. However, thats not the case when loading a channel from the SD in the SD Menu it still takes up block space. So really whats so great about it? I could manage my system's memory before hand and leave games and channels im not currently playing on my SD. Just my thoughts.