If your question is more about Appendix G, you might get more responses with this list:
http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
since this list is more specifically for EnergyPlus.
I
don't agree with your assessment of ASHRAE 90.1-2007 Appendix G. In
your proposed design, the cold room is a separate thermal block from the
rest of your model and your baseline needs to match your proposed
design with respect to thermal blocks. See Table G3.1, 7. Thermal Blocks
- HVAC Zones Designed.