Importing All jpg files into Keynote from a certain folder with AppleScript

How do I automate importing all jpg files from a certain folder into Keynote with AppleScript? The following example allows the user to choose the folder and the files to import. I want it to automatically import all files from a certain folder. - Thanks for your help!

-- PROMPT USER TO SELECT ONE OR MORE IMAGES
**set** theseImageFiles **to** ¬
( **choose file** of type "public.image" with prompt ¬
"Choose the images to import:" default location ¬
( **path to** *pictures folder* ) **with** multiple selections allowed)

-- CREATE THE DOCUMENT

**set** thisDocument **to** **make** new *document* with properties ¬
{document theme: *theme* "Black", width:documentWidth, height:documentHeight}
**tell** thisDocument

-- IDENTIFY THE MASTER SLIDES THAT WILL BE USED

**set** masterSlideForImage **to** *master slide* "Blank"
**set** masterSlideForTitle **to** *master slide* "Title & Subtitle"