A way to import pre-set template into static wp page?

I want to use an “out-of-the-box” sales-page, from a downloaded collection of pre-coded templates, as my static front page. I know how to create a static front page with blog post pages following. But because you must first start with a wp theme, I’m not sure which files to replace so that the static page shows only the sales-page template components.
The sales page template I’m using has text.html, and a 5-.jpg-component border in an Images file. I have no trouble importing the text html into a newly-created file in the theme, naming it front.php, and choosing it as the front page in the Pages editor; it shows up fine.
But substituting the pre-made template’s Image folder for the current theme’s Image folder does not make the border show up around the text. I’m assuming that’s because something in the image.php is still pointing to the original Images file, and somehow neeeds to be switched to “get” the new image folder, but I’m not sure how to do this.
I’m using the simplest white theme I could find, Simplr, and I can give the URL if someone can look and tell me the best way to do this, thanks