I don't have a PS2 usb cable so I downloaded lenschanger10b6_iso and burnt it to CD-r. I want to change a 400b laser in a V3 to a 400c. The V3 will boot CD-r backups fine but it wont boot the lenschanger CD. It splashes up the Playstation 2 logo for a split second then just goes to black screen. Am I doing something wrong? Any help is appreciated!