This is from the ReadMe file with ACR v5.6;
'Photoshop Elements:
Windows®:
NOTE: You must follow all of the new instructions in order to successfully install the Camera Raw Plug-in
for Photoshop Elements.
1. Exit Photoshop Elements
2. Open the download file and double-click CameraProfiles.exe and follow the on-screen
instructions.
3. Double-click Local Disk (C
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
4. Navigate to location designated by your version of Photoshop Elements:
a. Program Files\Common Files\Adobe\Plug-ins\Elements 8\ File Formats
b.
Program Files\Adobe\Photoshop Elements 7.0\Plug-Ins\File Formats
5. Move the existing Camera Raw.8bi plug-in to another location (for example, a new folder on your
desktop). Ensure you keep this version in case you need to revert back.
6. Copy the Camera Raw plug-in, Camera Raw.8bi, from the download into the same folder as Step 4.
7. Launch Photoshop Elements'
Hope that works.