Paint Shop Pro :: Resize Script With Set Width And (aspect Ratio) Height?

I am trying to create a script (that I can run on a batch of images) that will resize the images to a set width but will maintain the proper aspect ratio of the images. There are many images and they are all different dimensions.

I want to resize them for webpages to a standard width (300) and have the height be automatically adjusted to the new width (proper aspect ratio).

When I try to create the script, it automatically uses the aspect ratio height of the image that was used to create the script.

When it runs on additional images it automatically sets their height to the height of the first image (used to create the script). As all of the images have different dimensions, the end result is wrong.

Is there a way to write the script so that it will maintain the proper aspect ratio of multiple images, all with different dimensions?