Movie Maker Caption Text Improvement Inquiry

I am inserting caption text to each image/individual photo in my movie and have chosen bold Arial, bolded the font, increased it to 36 point, changed the color and it is still too meek to be read over most of my images.  I need to border the words, frame them some how or apply a back ground color to help it read with less effort.  Is there another option?  Back ground color is available it seems for the image background itself?  Do I need to find another software that will alloy the edits I seek?  I have tried the creative text options of flying in scrolling up etc while they are great, they are distracting when applied to each photo.  I just want the text to be stationary, and noticeable.  Thanks!