Rocks 6.2 allows for environment modules (currently on Demeter and Loren)
To see currently loaded modules:
module list
To see available modules:
module avail
To see which modules are required to load a specific module:
module spider <module_name>
To load a module:
module load <module_name>
When the cluster is shutdown, nodes are rebooted, or new software is compiled you need an admin to copy the module files to each node.