I thought I'd post this here as help, even though it might not be the best place for it.
As detailed in another thread, I bought a 512MB SanDisk Memory Stick Pro Duo (MSPD) to replace the 32MB Memory Stick Duo (MSD) that came with my PSP.
I've tried to use it: under Win2K with an internal Sony VAIO MS reader, WinXP with an external multi-card reader and also an internal MS reader. None of these work. The only method that works is using a PSP data cable to read the card via that method.
So, not all is lost, it's just strange that none of the other methods work. Or am I blissfully ignorant of something else?
matt