EDIT 1: very rare problem, might of just been my psp acting up from overheat or what have you, i never encountered this problem again. must of been nothing to worry about, will update if it ever happens again, doubt it tho...
I am surprised running the data install even worked. Every time I try it, it crashes my PSP.
There is no need to run the data install since you will have to patch the iso and run it from the memory stick.
Belmondo,
I tried your "quick" patch for english title screen and it does nothing for PKP.
-ChepChep