How to: Modify NEO Converter/PAD to support up to 32GB
Dr. Neo over at the NeoFlash forums has posted a simple tutorial explaining how to modify the 2in1/4in1 PSP memory converter and 8in1 PSP PAD to support up to 32GB of flash memory on PSPs running firmware 2.70 or later. the procedure does involve cutting a short on the circuit board itself so be careful if you attempt this and realize that you would be doing so at your own risk.
32GB+ NEO Converter/PAD Mod
Source:
NeoFlash