Also depends on what version of 'Toast' you are using. Amazingly, they use the exact same version numbers for both the OEM versions (that may come with your burner) and the retail versions. Needless to say, the OEM versions are somewhat less powerful and certainly have different menu options.
However, with OEM V. 4.1.3,
any and
every data disk burned is ISO9660, automatically. As a matter of fact, there is
no menu option to choose. It just works! Strange to me that the 'full' version makes the user work harder!
Why not just set a pref and change it (for what reason I don't know!) when you want.
Jim C.