Hey guys! Wanted to add my new RAM and test it with memtest86+. Tried testing it with the old RAM before. Burned an Image on CD and wanted to boot from it BUT it didn´t work. I hold c, or option when it starts up. No booting and no CD shown. I am no longer given the option to startup from any other disk other than my internal hard drives. Is this due to Lion? I cannot believe that. Need some help, please.