Following links could be useful:
Above article is written for an older version of MRA, so some information could be stale, but still could be a good starting point. Please read eSubmissions as MRA in the Article.
To read more about MRA, please see the solutions guide:
To read more about RCA Building Block, please refer to:
Hope this helps.
I could find following links that could be helpful
I would also suggest that you look at the resources on devnet.
http://www.adobe.com/devnet/livecycle/testdrive.html (see the Managed Review & Approval)
as well as the downloads and full documentation http://www.adobe.com/devnet/livecycle/solutionaccelerators.html