[GUIDE] Sickbeard for MBL

I first tried to install nzbget trough your guide (i have posted a question there) but i continue whit this installation.

After the step:

Now let’s start sickbeard manually

/opt/bin/python2.5 /opt/share/sickbeard/SickBeard.py

I get this:

-bash: /opt/bin/python2.5: No such file or directory

on my MBL there is a installation of python2.7

So i tried to adjust the path python2.5 to 2.7 in the line (i am a noob) then i get

 The Python module Cheetah is required

Can someone help me?