the easiest way I can think of to make a ppt presentation play on a stand alone dvd player would be to open the file in power point, save the slides as .png’s (file>save as>select “PNG Graphics Format” under the save type dropdown menu>save>select “every slide” from the popup) this creates a folder with every slide in the ppt file saved as image files. you can then add these images into a burning program that will let you create a DVD or VCD photo slide show (Nero vision is one) using this method you will lose all animations and transitons though. Also, I recomend a DVD slideshow over VCD as the DVD will be higher quality (VCD is 1/4 the resolution) and DVD is usually more compatible too, but you can always try both to see which one works out better for you
for the high-res pics, try a google image search and choose to view large images only, just remember that if you are using the images for comercial purpouses you need to check if the images are copyrighted, and if they are you must get permission to use them