He visto por ahi esta utilidad nueva para las 1.50
"This corrects the problem where MS1 and MS2 are not showing up correctly. According to the translation: “Start the software first, then click “Generate” and it will create MS1 and MS2 folders for you. Then copy the MS1 and MS2 folders in to /PSP/GAME/. The rough translation of the author is: “Implementor: Y_t idea contest production: Alpha”, if you know please let us know! "
esto me parece que no es para utilizar una sola memory stick, sino que es una utilidad para instalar las cosas mas facilmente en las memorys sticks, corregidme si me equivoco, salu2