Breakfast

Breakfast is a little Applescript Studio app for OS X which mounts Toast disk images when they are dragged onto it.

It requires Roxio Toast 6 Titanium. If you mount Toast images on a daily basis, you will likely see Breakfast's merits, and if you don't, then you will likely wonder what the point is. It has a readme.
After I made Breakfast I noticed that someone else had the exact same idea, but earlier, so I also recommend that you try his - it's probably even better.
Why is it called Breakfast? Because it's a quick piece of toast. What's New
This is the first version, a preview. It has an issue that when the computer is restarted, the Toast app will need to be used once to mount the first disk. Logging in and out won't require this step to be repeated. Requirements
PPC, Toast 6 Titanium