This can be done. I've tested on two machines one vl-light and one VL standard but this seems to work.
I would have submitted to repos' but I just could not get one dependency to build.
Everything needed is a .tlz so you can uninstall if it does not suit you. Except fot the one I couldn't build which I
found as a .tgz so you can uninstall that as well.
First we need to install DocBook
DocBook 4.1.2 DTD
found at http://scrollkeeper.sourceforge.net/data/docbookx412.tgz
This is the one I couldn't build.
DocBook XSL 1.48 Stylesheets
able to build find it here....www.opensourcebistro.com/packages/docbookxsl/docbook-xsl-1.48-i586-1vl60.tlz
With those installed you will be able to install scrollkeeper
which I've build here...www.opensourcebistro.com/packages/scrollkeeper/scrollkeeper-0.3.14-i586-1vl60.tlz
One package needs upgrading from what is in repo.
I've built it here....www.opensourcebistro.com/packages/libxslt-1.1.23/libxslt-1.1.23-i586-1vl60.tlz
3 packages need to be installed from GSLAPT
If you are using VL6.0 standard you can skip this.
LIBGNOMEUI 2.22.1 light users only (standard already installed.)
GNOME-VFS 2.22.0 light users only (standard already installed.)
GCONF 2.10.0 light users only (standard already installed.)
Now install planner from here.www.opensourcebistro.com/packages/gnome-planner/planner-0.14.4-i586-1vl60.tlz
That's it! Look for "Project Management" under the office category in the menu.
If any other packages could look at http://scrollkeeper.sourceforge.net/data/docbookx412.tgz
and see if they can package that would be great.
I'll be able to upload 'Planner' then.