The point seems to be that it allows you to record data and audio on the same CD. That is, IF you figure out the steps that are missing in Toast 8's User Manual and Help. Here's how to make the CD:
1. Click on "Audio," then "Mixed Mode CD" in the formats panel. (If "Mixed Mode CD" isn't listed, open Toast's Preferences and in the General pane, check "Show legacy formats & settings.")
2. Drag the desired audio files to the Content Area.
3. Click on "Data," then "Mac & PC" in the formats panel.
4. Drag the desired data files to the Content Area.
5. Insert a blank recordable CD (for test purposes, try this on a CD-RW first).
6. Click the red Record button
7. Click the "Basic" tab, then choose your desired settings.
7. Click the "Advanced" tab, then in "Write Mode" choose "TAO" for Audio & "Write Session" for Data.
8. Now click the blue Record button.
I don't know why Roxio skips the "Write Mode" steps in their instructions. Probably a proofreading error nobody noticed because nobody tested the current instructions! Sorry, I haven't tried making a disc image from the CD yet.