here some tested lines on the installation - possibly good for the manual?

# firstly, install mysql-server
sudo apt-get install mysql-server mysql-client

sudo apt-get install imagemagick
sudo apt-get install apache2
sudo apt-get install php5 libapache2-mod-php5
sudo apt-get install php5-cli php5-mysql php5-gd
sudo service apache2 reload

# PHP configuration
sudo vim /etc/php5/cli/php.ini
# settings to set:
# register_globals = Off
# memory_limit = 128M
# magic_quotes_gpc = Off
# file_uploads = On
# post_max_size = 100M
# upload_max_filesize = 100M
# session.gc_probability = 0

# apache config
sudo nano /etc/apache2/sites-available/newscoop
# adding the following lines to the empty file
<VirtualHost *:80>
      DocumentRoot /var/www/newscoop
      ServerName newscoop.local
      DirectoryIndex index.php index.html
      <Directory /var/www/newscoop>
              Options -Indexes FollowSymLinks MultiViews
              AllowOverride All
              Order allow,deny
              Allow from all
      </Directory>
</VirtualHost>
# then continue
sudo mkdir -p /var/www/newscoop
sudo a2ensite newscoop
sudo a2enmod rewrite php5
sudo service apache2 reload

# download Newscoop
# change the wget command if you want a different version
cd
mkdir Sources_Newscoop
cd Sources_Newscoop/
wget http://sourceforge.net/projects/newscoop/files/4.0.2/newscoop-4.0.2.tar.gz/download
# sourceforge saves the file only as "download". we need to change that.
mv download newscoop.tar.gz
tar -xvzf newscoop.tar.gz
sudo mv newscoop-4.0.2/* /var/www/newscoop/
sudo chown -R www-data.www-data /var/www/newscoop/

# add newscoop.local to the hosts list
sudo nano /etc/hosts
# add the following line to the file
127.0.1.1       newscoop.local

# Open firefox, go to page: http://newscoop.local
# finish installation, use password sourcefabric for admin
# go to admin page
# http://newscoop.local/admin/
# and login (admin|sourcefabric)
#   Content > Publications > Configure
# change title of publication to: Newscoop Demo
# SAVE
# Go to: edit aliases & add: newscoop.local
# back to publication settings.
# select newscoop.local as "default site alias"
# SAVE