[pstricks] Factor tree supporting comments

[David Arnold]

All,

I have a nice factor tree:


\documentclass{article}

\usepackage{pstricks-add,pst-tree}

\begin{document}

\begin{center}
\pstree[nodesep=3pt,treesep=1,levelsep=0.7cm]{\Tr{24}}{%
	\pstree{\Tr{4}}{\Tr{2}\Tr{2}}
	\pstree{\Tr{6}}{\Tr{2}\Tr{3}}}
\end{center}

\end{document}

What I'd like to do now is to write some short explanatory text to  
the right of the tree, each phrase at the same level as each level of  
the tree.

Any suggestions?

David