PSE 8 compatibility with Adobe Bridge CS 5 Camera Raw

Question

I have Photoshop Elements 8 installed with Camera Raw 5.5 on a Windows 7 64-bit platform.  I recently purchased Photoshop CS 5 which came with Camera Raw 6.2.  I think both products work well independently, with the exception noted at the end of this posting.  Where I'm encountering an issue is when I use Adobe Bridge to access an image file for processing which invokes Camera Raw 6.2. -- the changes made to the file show up in Adobe Bridge, but are not observable when the same file is viewed in the Photoshop Elements Organizer.  When I look at the file properties I can see that Camera Raw 6.2 updated the file and the updated date does appear in the file properties accessible through PS Elements Organizer.  However, the items listed in the Camera Raw metadata are different in the two products (PS vs PSE).  Since the sidecar .xmp files are a form of XML, I'm wondering if Camera Raw 6.2 is writing data in a structure that is not supported by Camera Raw 5.5?  I've tried to update PSE Camera Raw to version 6.2 following the instruction that appear on line, but it does not seem to install.  Durring installation there are no error messages, but after the "installation" PSE Camera Raw still shows version 5.5.  I noticed this first when editing a large number of "legacy" .jpg files, but I also have concern when editing Nikon .nef files.
It's a bit hard to tell, but when editing .nef files in Camera Raw 6.2 the changes may migrate to PSE once I tell PSE to update the thumbnail view.  But what I observed was a very distinct differece in file's visual appeared when viewed in Adobe Bride CS5 vs PSE 8 Organizer.  The PSE 8 images had greater color saturation.  This leaves me wondering what's going on.

Answer 1

On my Windows 7 64 bit system the original version of Camera Raw.8bi was found in:
C:\Program Files (x86)\Common Files\Adobe\Plug-Ins\Elements8\File Formats\ and had a size of 11,781 Kb shown in Windows Explorer.  The file properties listed the size as (12,063,088 bytes).  The digital signature was signed Thursday, September 03, 2009 3:34:37 PM.  To the best of my knowledge this is the version that shipped on the PSE 8 disk which I installed in December 2009.
There is another copy  of Camera Raw.8bi found in:
C:\Program Files (x86)\Common Files\Adobe\Plug-Ins\CS5\File Formats\ and had a size of 11,856 Kb shown in Windows Explorer.  The file properties list the size as (12,140,496 bytes).  The digital signature was signed Friday, August 20, 2010 3:30:03 AM.  This date post dates the installation of Photoshop CS 5 on my system so it must have happened through some (automatic?) update.
The Camera Raw.8bi file that I've down loaded from Adobe for ACR 6.2 is the same size and has the same signing date as the one identified immediately above in the CS5\File Formats\ sub folder.
When I copy the down loaded file into the Elements8\File Formats\ sub folder PSE still indicates that ACR is version 5.5
I also have a copy of ACR in C:\Program Files\Common Files\Adobe\Plug-Ins\CS5\File Formats\ with a length of 14,526 KB shown in Windows Explorer.  The file properties list the size as (14,874,576 bytes) and the signing date as Friday, August 20, 2010 10:39:07 AM.  I presume this to be the copy of ACR used by Adobe Bridge and Photoshop which I installed as a 64-bit application.  Since the signing date (but not the time) is the same as the date for the file in CS5\File Formats\ I'm guessing that it is also the result of an automatic update to version 6.2.
Something that's not making sense to me is that the down load was approximately 50 MB and I'm messing around manually moving a 12 MB file into a specific sub folder.