I spent a lot of time looking through various sites on the internet, before I found the easy solution on how to install PDT (PHP Development Tools) on Eclipse Galileo on my Ubuntu box. It was much easier than I first anticipated.
- First, install Eclipse via Synaptic. There is a packages.
Second, make sure that you have the Galileo update site (download.eclipse.org/releases/galileo) present under Help Install new software Available update sites
Third, go to Help Install new software and choose the Galileo Update Site. Under Programming Languages you will find PDT. Just choose it and install.
See that was much easier, than I expected.