If all you need is a simple fading slider, such as the link you provided, mojoPortal has this functionality already built in the HTML Module.
- First create the HTML module on the home page of your site
- Click settings and then click "Slide Show Settings"
- Check "Enable Slideshow of Elements?" checkbox
- Delete all settings in the "Slide Transition Effects" field except for "fade"
- All the other settings are optional, change them to what you need
- Click save and when the home page has loaded click on "Edit"
- Add your images to the content area, make sure that each image is in it's own paragraph
- Click save, and your slideshow should be working
Hope that helps,