Lets say you have downloaded the files for Adobe CS6 from the Adobe Volume Licence (VL) Site, just installed Adobe Application Manager Enterprise Edition to get a MSI made with your serial number/ect setup and ready.
However, every time you try to point the Product Installation Folder at your download from the Adobe VL site all you get is the error
A valid installer could not be found.
The simple solution to this problem is to first extract the data from the download from the Adobe website and then point the Adobe Application Manager at this folder with the extracted files in.
The screen shots below show this process a little more clearly.