There is no fix yet. But there might be a patch released (On PSN) which enables it to be played on firmwares lower than 3.60 the same way there was a patch for Brink and LA Noire.
For now you can try different Eboot.BIN files from other games in hope it will work (Keep the original Eboot.BIN file from the game though)
UPDATE!: I found this patch for "No More Heroes Paradise" (BLJS-10072) It is 3.0 FW and may work I've downloaded it and re-uploaded it to Megaupload.
Just install it using "Install Package files" on your XMB menu and play the game (CROSS YOUR FINGERS!)