Adding extra text to File Info fields with unique content

Is there any easy way to add a piece of text (e.g., ©PhotographerName/AgencyName) at the end of the existing block of text in Bridge's "DESCRIPTION" filed (also know as the "FILE INFO" field n Photoshop. I have many prepared images in bridge, all with different captions in the "Description Field," and I would like to add ©Rob Crandall/AgencyName to the end of every different caption, in an automated way. I currently have to paste my byline one-by-one to every image file, because all the captions are different. Is there a way to automate this?

Many thanks.
Rob Crandall