I managed to install Doctrine using the svn:externals technique in Eclipse/Subclipse (SVN).

Doctrine, Eclipse, Subclipse, SVN Hide

I have not been successful in getting Propel to work on my system. The problem may have something to do with phing. I gave up and decided to focus on Doctrine instead.

Doctrine, Phing, Propel Hide

I think that using an ORM might speed up some of the PHP development I am involved in. The two main contenders are Doctrine and Propel.

Doctrine, ORM, PHP, Propel Hide