New To Drupal and OMP

I'm front -end developer new to Drupal but not new to other CMS's.
I'm trying to get proof of concept up and running like http://www.denveropenmedia.org/
I have drupal 6.22 up and running though it won't allow me install the MERCI & Open Media System modules.
That is that I need to get these and the other OMP modules up and running?

thank you in advance for any tips, help and/or advice.

Have a good one.

Sven