AR Max USB .max files woes

Ok, so I bought the AR MAX w/ USB. Things seemed fine, as I was able to load the 'stock' BADATA-SYSTEM.max onto my card and un-crush it. By 'stock' i mean it was the file that came with the "ps2xme" package. I was also succesfully able to boot into whatever the program is that this 'stock' files has, but i need HDD support (that was my whole reason for doing this). I tried to make a new .max file with save_bulider_0.8x, but when i try to load it from my USB drive to the MC I can't because it says it is corrupt data. No matter what I do, I cant make a new .max file that has the utilities i want on it. Any ideas would be great. Thanks