I don't know if Paint Shop Pro supports it but you can create an action in a program like Photoshop that will add the watermark to each image as a single batch operation.

The best way to do it is to start by creating a target folder for the images so they don't overwrite the originals.
Then resize based on the size you want to end up with, convert to sRGB, add a small amount of Unsharp mask and then add the copyright. Then Save as JPEG into the target folder. If you put s stop in the action immediately after adding the copyright, you can move the copyright to a more pleasing location in the image before continuing the action. All of this is possible with Photoshop.

i just got photoshop larry how do you do it?

Using the text tool. That's the tool with the letter "T" on the vertical toolbar. Typing on an image automatically creates a new text layer. Make sure to save your full size file, then size it for the web or whatever you want to use it for with text. Then save it at the finished size and resolution before adding the text. Also, before going to JPG for the web, make sure to save it with the text layer active so you can edit it in the future.

A tip. Converting to sRGB automatically flattens the text layer so make sure after doing Save For Web, you don't save the changes. That's why it should be saved with an active text layer to prevent doing extra work in the future.

Here's a page explaining how to create the copyright symbol on both the MAC and PC:
copyright symbol information