Batch Rename - Two File Formats with Same Name

Hi everyone!

I'm having troubles using the batch rename function i Bridge CS5.

I've got several pictures that I've captured in both jpeg and raw. When importing the pics with windows photo import they get the same name. This means that I've got one JPG and one RAW file which contains the "same" picture, and have same name as shown below:

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What I would like to do is to rename the pictures, but still have Bridge name the same pictures with the same name as shown below:

     IMG_1268.CR2          ->          Picture 2011 - 0001

     IMG_1268.JPG          ->          Picture 2011 - 0001

     IMG_1269.CR2          ->          Picture 2011 - 0002

     IMG_1269.JPG          ->          Picture 2011 - 0002

Is this even possible? And if possible, how?

Thanks in advance

Martin