Sorry Ibrahim, I don't think there is such a thing.
There are a few snippets on YouTube (for example: https://www.youtube.com/watch?v=m7OWHy5Fa5A ) but no full-fledged training.
There are a series of short videos on http://www.youtube.com/user/Cisco/videos?query=Prime+LMS . These videos cover the basics. On the Cisco channel search keywords: Prime LMS
Cisco partners should go to Cisco PEC (www.cisco.com/go/pec), search keyword: Prime LMS
try this link, you'll find links to some vids for LMS 4.x
Hope this helps