My lab box is 3.2 at this time but I think that the pathing is the same.
The source of my automation folder is
C:\Program Files (x86)\Altiris\eXpress\Deployment Server\AutoFolderPkgs\nameofmypackage\x64\AF_nameofmypackage.exe
On a client (if you bring up the agent status on the client you can see the job take place includeing the paths used)
c:\windows\temp\AF_nameofmypackage.exe.
On the root of the client drive there is also a few logs files that might assist to determine if it is executing or being killed before it executes.
autoutil
autoinstx (x being the number of times the installer has ran) In my case it was autoinst3
Hope Andy's location and the logs can get your situation worked out.