Originally Posted by SpideyBR

Easier method.

Requirements:
internet (only for installing the necessaries packages)
rootsh (if you don't have it, find it in the app manager software)

Open a terminal (ctrl+shift+x or browser thru the menu). You are at your home folder (/home/user)
Create a folder to organize the files: mkdir psfreedom.
Change into that dir: cd psfreedom
Download the package: wget http://xceleo.org/psfreedom.tar.gz
Unpackage it: tar xvzf psfreedom.tar.gz
Give scripts execution permission: chmod 755 *.sh
Correct the module permission: chmod 444 *.ko
That's it. It's installed. To run: ./psfreedom-enable.sh
To stop: ./psfreedom-disable.sh

Simplifying, connect your n900 to the internet and then:
mkdir psfreedom && cd psfreedom
wget http://xceleo.org/psfreedom.tar.gz
tar xvzf *.tar.gz && rm *.tar.gz
chmod 755 *.sh && chomd 444 *.ko
That's it, it's installed in your home folder.

To run:
sudo /home/user/psfreedom/psfreedom-enable.sh
To stop:
sudo /home/user/psfreedom/psfreedom-disable.sh

Or:
root
cd /home/user/psfreedom
./psfreedom-enable.sh
And, to stop:
./psfreedom-disable.sh