Again I do plan on making a tutorial for this,
My next psp I am hoping to add a single SD reader on a switch so the psp can read both SD cards and memorystick, while being able to play UMD's (i am using a memorystick to micro to convert the 2, then just connected the SD card to the micro pins, which is a little different because of an extra ground, It works, not sure if I can do the SD without the converter/adapter) for dual sd, it would be easy to use a memorystick to dual micro sd.
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Custom White PSP, 5 blue 3 red sound reactive LED's, UMD jewel,<a href="
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