Need some python related help please..?

Hi there, I am trying to install turbogears however I am stuck. I need to:

"
Once Python is installed, you need to install the SetupTools and VirtualEnv packages into the new Python installation. To do so:

$ curl -O some_url_i_cant_post_due_to_being_a_new_member_/ez_setup.py
$ sudo python ez_setup.py "setuptools==0.6c9"
$ sudo easy_install virtualenv
"

However as I understand if I type it like that, it will install that into the system python (launching /usr/bin instead, right? As it does when i type python at BASH)... Anyway I have another python installation i would like to use at /usr/local/bin... How could I install it to that one..?

I am using Mac OS X 10.6.7 ...

Please help..!