magic memory stick

hey im just wondering whether the magic memory stick that is created from the fat psp to turn the slim to 3.71 m33 is the only one u can use. So if i made a 1gb magic memory stick could i not run 3.71 m33 if i inserted my 4gb normal one? also upgrading from 3.71 to 3.71 m33 v2 do i need a fat psp again?
If any one could help i would be extremely greatful
Fras

If you use despetar cementerio from dark alex website you can put this on your magic mem stick use the pandora battery and will recover straight to 3.71 m33.