Configuration for Tesla S1070

Hi all,
I’m working on a Linux Beowulf Cluster with 20 nodes. Now I got 2 new nodes with 2 NVIDIA TESLA S1060 each. Now I’m looking for the best software solution.
Since the Beowulf Cluster uses Debian, I thought Ubuntu would be the best decision.

Has any one experience, how to integrate these nodes into the other system, for example the queuing system or the NIS user stuff.

Also, the nodes don’t have NVIDIA graphic cards. They have on board ATI graphic chips, so I don’t know how to control the cards…

Hope someone can help me with this…