My ex has kindly lent me her PSP.
It was an original 1.5 Japanese phat unit but somehow was 'upgraded' to version 2.6!
It looks like all the files, folders etc are still on the memory stick but the ISO's can't been seen from the memory card folder so I guess the upgrade to 2.6 removed that ability straight away.
So, what is the easiest way please to take it back to 1.5 to allow us/her to play the ISO's again.
As stated: It's a 2.6 version, phat, I've Vista and no Pandora battery. However, my son is currently over with his PSP which has the latest Dark Alex version installed.