John, unfortunately, ProShow Gold won’t let you place your video clip on the still shot timeline. On the finished DVD menu are separate menu buttons, one for video, another for your stills. When you click, to play the video clip, there’s a blank screen, then continues (video or still). You can’t make a transition from video to still shot, like you can with Vegas Pro.
ProShow Gold is effective if you’re looking for a way of creating a still slide show with many stills. There are a lot of transition effects, narration, placement of your music, you can’t beat Vegas Pro for higher quality output. But, that means more manual work involved.
If you do decide to use ProShow Gold, let us know your impression so others can have more insight to better decide which might work for them.
Good luck