trying to open a .dmg file but a warning came up saying "following disk image failed to mount" and giving the reason as "not recognised". a friend told me to try opening it with toast which opened it in the Copy-image file section. i tried to burn it to dvd (it's 3.6 GB) but was told "cd-rom xa or audio files cannot be written to dvd" tried to burn it to cd was told it was too big. can anyone help? opening the original, burning to dvd or mutiple cds. anything!