Instead of 'boot', do you really mean 'mount'? The only CDs you can boot from are CDs with some sort of system software on them, like your Mac OS X Install CDs/DVDs. You cannot boot your computer from a game CD.Scott B said:I am having trouble reading certain disc on my emac. When I insert a system disc that came with my emac it will boot, but if I insert a game cd it will not boot. Any ideas?