Installation

I assume that you use a unix style system (e.g. Linux) and that you already have an installed and running Zope Server with Plone on it.

1. Log in to your server

ssh root@example.com

2. Go to your Zope Product directory

# cd /srv/zope/zinstance1/Products

3. Download the product

# wget http://dev-itm.fh-joanneum.at/svn/eNcephalon/ploneproducts/PloneStarter/tags/PloneStarter_v1.0.zip

4. Unzip the file

# unzip PloneStarter_v1.0.zip

5. Check owner and group permissions

Thanks to cjs for this comment.
Check for the proper file owner and group. Otherwise the product will not show up / work properly.
From the Products directory run something like the following to get your systems owner, group and permissions:
# ls -al
Output snippit with ownership problem :

   drwxr-xr-x  10 501  501  4096 2006-04-12 19:02 PloneStarter
   drwxr-xr-x  10 zope zope 4096 2006-04-12 19:02 PortalTransforms

To fix ownerships run something like:
chown -R zope *
chgrp -R zope *

6. Restart the Zope Server

# /srv/zope/zinstance1/bin/zopectl restart

7. Install Plone Starter within Plone

Log in to your Plone Site as the Administrator (admin).
Select 'Site Setup'
Select 'Add/Remove Products'
Select the box before 'PloneStarter 1.0' and select 'install'

Read to use...

Just add the 'plone starter' object somewhere on your site.

Relating How-To´s:
Installing Add-on Products - How-To @ Plone.org