[modeller_usage] modeller 9.11 and Ubuntu 12.04 installation

from modeller import * line in scripts fails with ImportError: No module name modeller

I have tried variations of the ln commands shown in the installation guide for Ubuntu 8 substituting 2.7 for the python version but still get the error message when trying to run the samples with command lines beginning with mod9.11 or python followed by the sample script file name.

I've looked over archived messages and have been unable to find a solution to this problem. I would appreciate anyone that has installed modeller 9.11 on ubuntu 12.04 successfully telling me what particularly I need to do to make it work. The installation of modeller itself seems to have gone ok as the modeller files seem to be installed.

Thanks!

Mike