no if you back it up you can make it play on 1.5 i am playing it right now on 1.5 all i needed was a programe called dycryptor (http://www4.rapidupload.com/file.php?filepath=7586)
load the eboot for pes when you made iso on this and then change the eboot name that found in dec to boot.bin get the prx from another iso you have preferably wep and then your all set remake the iso
save you seaqrching though 23 pages of chat till you find it in the maxconsole
got the game anyway in the nick of time....quite a bit of slowdown on corners etc on wireless mode and also a bit long to get a game going after screen after screen loading up.....not what you want on a basic battery!
but apart from that its well smart.
running up and down the isle of the plane doing a ravenelli certainly got a few looks....
yeah, i managed to get PES 5 working on 1.5 once i had tinkered with the ISO, it's still the same as winning Eleven 9 UE though? It sucks you can't transfer the kits from the PS2 version, just the logo's