I am giving it a try in a RHEL6 working station without root permission, so I modified the "/cctbx-installer-2014_09_21_2205/lib/libtbx/auto_build/install_distribution.py" file and changed one line:
destination = "/usr/local"
with the new path:
destination = "/scratch/cctbx-new"
The installation went pretty well until it got stuck trying MatplotLib, I don't think it got stuck because of the little hack I did, but still worth commenting and chowing the full console output.