Associate original Raw files with JPEGs tagged with metadata?

Question

Before the advent of Aperture, I used to use Adobe Camer Raw (ACR) to do all my raw conversions, and save the settings in sidecar XMP files. Then for 10-20% of the files, I'd do some more processing in Photoshop and generate PSDs. These were all my master files (raw + PSD).
That was fine as far as it went, but it didn't allow any serious organizing or searching capability.
So I would do a batch export of highest quality JPEGs of all these master files, and import those into iPhoto. I'd then rate, keyword, comment, and organize the photos in iPhoto. If I ever wanted to go back and make a 13x19-inch print, I'd use iPhoto to find the file (via metadata such as keywords, date, album, comments, etc.), then use that filename to go back and find the original raw (or PSD) file and print from that.
Of course, aperture obviates the need to have 2 independent sets of images like that for new images.
However, what if I want to bring my old images into Aperture? I'll import the iPhoto library, and get the benefit of all the metadata tagging (ratings, keywords, etc.), but still have to go back to and separately import the directories of original raw files. But then the JPEGs and the raws are not associated in any way.
I have not changed any filenames, so the JPEGs and raws have exactly the same filenames except for their extension. Is there any way in Aperture to associate them with each other, or automatically apply the metadata from the JPEGs to the raw files? An Automator action maybe?
Thanks for any assistance.

Answer 1

<...>
So I would do a batch export of highest quality JPEGs
of all these master files, and import those into
iPhoto. I'd then rate, keyword, comment, and organize
the photos in iPhoto. If I ever wanted to go back and
make a 13x19-inch print, I'd use iPhoto to
find the file (via metadata such as keywords,
date, album, comments, etc.), then use that filename
to go back and find the original raw (or PSD) file
and print from that.
<...>
I did a fairly similar thing, as I think did a lot of people.
However, what if I want to bring my old images into
Aperture? I'll import the iPhoto library, and get the
benefit of all the metadata tagging (ratings,
keywords, etc.), but still have to go back to and
separately import the directories of original
raw files. But then the JPEGs and the raws are not
associated in any way.
I have not changed any filenames, so the JPEGs and
raws have exactly the same filenames except for their
extension. Is there any way in Aperture to associate
them with each other, or automatically apply the
metadata from the JPEGs to the raw files? An
Automator action maybe?
Well, I have an idea that might help...
Try importing both JPG and RAW files into the same project. Then view all the files in the project, and auto-stack... sicne the JPG and RAW files were taken together they should group, I am guessing in the same way for all of them (RAW on one side of the stack, JPG on the other).
Once you figure out which side is which in the stacks, use the Lift & Stamp tool to copy settings from each JPG into the RAW version. To make this quicker, select either the Lift or Stamp tool from the tool bar (I'd reccomend lift) and then hold down the Option key to change the tool into a stamp tool on the fly. Thus the process would be, click on a JPG to Lift, hold down option and click on the adjoining RAW to stamp. Repeat for each image, using the Project management view which is all thumbnails. Kind of manual but you should be able to finish quickly.
Good luck with the project.