Correct you can add the appropriate html for the file prompts and you will see its both the FOR SALE and PERSONALS templates that have file upload ability. Not much need for WANTED or HELP WANTED to need to upload photos.
You would need to base any of your new templates you create off the for sales templates and alter from there. There is a tutorial on adding new template sets in the install forum and as far as specific modification questions which fall outside product support like how to design your own custom things you can post in THE MOD CORNER where users can assist other users.
You can also use a wonderful tool like beyond compare by scooter software that can compare one template to another if your looking at just adding portions of code.