OK Another update:
I have deleted all the stuff i've got from the .iso file and have extracted the iso's contents using isobuster. Now the folder with files is only 912mb, about 40mb less than before

. So I've patched the boot file and have tried running the game with devhook 0.21 and 0.22. Both fail and 0.22 gives an error "pre-patch error".
Please could someone post their working ppf file and their ppf applicator. Plus if someone knows what i'm doing wrong please help. I'll be forever greatful.
PS, Do you have to put the ppf file on the memory card? If so, where? Cheers!!
Edit: I realise you cant attatch ppf files on here. If you can help me maybe you could use e-mail? Cheers