Phil,
How do I find the actuations info for the 5D?
You can use the {actuations} variable in your Info Text (Edit->Set Info Text...)
The actuation count (if your camera supports it) will appear in the Tooltip text and in the Info Text in the Preview window.
BTW, I believe that the 5D is like the 20D and 30D in that it does not have a true actuation count. It is based off of a folder number and the frame number of the photo which is not accurate but is the best information that we can gather.
-Kirk