Rock Band 2 - some songs won't load
I've finally got around to installing a crystal chip 2.0 in my v12 PS2 and I've just tried burning a backup of Rock Band 2, but I can only play some songs. A lot of songs cause the game to freeze at the loading screen.
I'm using 8x infiniti DVD+R DL discs with the booktype set to DVD-ROM and I burned it using imgburn at 4x and then tried again at 2.4x.
Is the problem caused by a bad quality media or a bad laser? Would it be better to find some DVD-R DL discs? Would calibrating the laser help?
Also as a second question, does anyone know where I can buy a HDcombo in the UK?
EDIT: I've just tried to boot 3 DVD-R discs but none of them work. Is that a problem with my modchip?