To use these models, simply include:
$CSIM_ROOT/model_libs/general_blocks/Library.sim
by reference. It will automatically include all of the models, and it
stacks them by category so the types are easily selected by library-tree.
See General-Blocks Models Tutorial for an introduction to the General-Blocks model library with instructions and examples on usage.
You should also add one Miscellaneous/Central_Utilities box to your simulation. It has no connections, but it adjusts some settings, such as animation modes, and debugging levels, to values which are appropriate for block-level modeling. You can place this box anywhere, but it is conventionally placed in a corner of the top-diagram.