Renaming question in Bridge CS3

When renaming, Bridge automaticaly renames a tif and jpg of the same name, the new name. For example, if a tif and jpg of the same photo are named 1.tif, and 1.jpg, and I batch rename these 2.xxx, both files will be renamed the same 2.xxx. Which is great. But I want to throw the original CR2 Raw file in the mix. So there will be three files of the same photo in the folder. I want to rename all three files of the same photo the same file name, not counting the extention of course.

How in the world do I do this, or can it be done at all?

Thanks for any help.