I will be using my default Kubuntu installation on my laptop. But basically, this should work the same on all Linux distributions and even on the Windows version of OpenOffice.org 3.0. Before we can change the default template in OpenOffice.org 3.0, we have to create a template. You have two choices – make a template from scratch or adapt one of the templates that OpenOffice.org 3.0 comes with.
You can find the default templates by opening OpenOffice.org 3.0. Go to the start menu select Applications (on you KDE Desktop or in Kubuntu). Then select Office. For the purpose of this how-to, we will use OpenOffice.org 3.0's word processor. However this will also work in Calc (Excel), OpenOffice.org 3.0's spreadsheet application. As well as in Presentation (PowerPoint).
OpenOffice.org 3.0 doesn't use a default template so you should now have a empty page. To open a template select file from the drop-down menu. Then select new, go to the bottom of that list and click on templates. Select Templates and pick your category. Chances are that what you need is not in the list of standard templates. This means we have to create the template from scratch. See images below for a step by step.