This plugin creates a testimonial and a testimonial rotator custom post type, complete with WordPress admin fields for adding testimonials and assigning them to rotators for display. It includes a Widget and Shortcode to display the testimonials.
It’s uses minimal CSS so that it matches your theme and there are several filters to customize it’s output.
If you need help, please use the forum on wordpress.org
This allows other developers to help you out and will probably get your questions answered faster.