Moving (not copying) photos

I do photo editing with various apps on my Macbook. My original photos are arranged by camera number (e.g., IMG_1234) under date. When I edit a photo in an app like Photoshop Elements and do something like HDR, I save the image as the original file name plus and extension (e.g, IMG_1234 HDR). I have a folder on my Macbook called Photo Art where I want all those edits to reside. Current photos I edit can be saved directly to that folder. My problem is that I have dozens of previous edited photo that I want to move (not copy) to the Photo Art folder. Is there any way to move them to that folder? Copying means that the originals have to be manually deleted. OS 10.6.8. Sorry to be so wordy. Thanks.