Some time ago I shot an image under studio conditions of a piece of flat art.
The image also contained a basICColor Grey Card and a mini-Gretag CC.
After processing the TIFF (having made a basic white balance using the grey card) I noticed that the image had a slight cast when opened in CS4. So, I used the Grey Colour Picker in Levels on the grey card and this successfully removed it.
Yesterday, I shot a detail of the same piece of flat art. But, because the client didn't want to waste pixels, I shot the grey card and CC seperately, but identically. I then applied the changes to the image and processed it.
However, when I open the image in CS4 I now have that same cast, but I don't have a grey card in it to use as a reference. So, if I was to apply the correction to the shot of the grey card, how can I then apply this to the art image?
Applying settings across images in ACR is simple, but how do I do this is CS4 to make the detail look the same as the earlier image?
1) first process both with identical settings in the raw processor;
2) open both converted files in CS4;
3) on the gray card image, add a levels adjustment layer, grab the gray dropper and click on your desired gray;
4) click and drag that levels adjustment layer from the panel directly on top of the art image and release.
5) you should now have the adjustment layer on top of your art image and assuming they were both shot in identical light at identical camera settings, the cast should be removed from the art image too.
HOWEVER... The fact you have a different WB in CS4 than you do in ACR means you have a color management issue somewhere in your workflow -- I am guessing you probably need a good (or better) camera profile to apply in CS4, or a better dedicated capture profile for ACR...