Thanks guys for your feedback. The reason for so many images is that we are using the slideshow to both show and proof all of our clients' weddings. We have been doing this for quite some time and it has been well received. I have one slideshow set to music and another that is controlled manually that serves as an index. This allows us to proof the images with a very high level of picture quality while restricting unauthorized reproduction of the images. As for the music, I have created a single mp3 file containing music of various length to give the desired image duration. This allows me to use the program's ability to auto sync images to music. I have only had the transition/duration speed issues beginning with the 4.4X versions. This morning I reverted to 4.31 and created a slideshow with over 1700 images and 50 minutes of music without problems. Each image is up for about 1.5-2 seconds and transitions are consistent. It works well from both the hard drive and a cd on multiple computers. So maybe it's just something characteristic to the 4.4X versions.