How to change the default numbering/outline scheme in Open Office Writer?

Open Office Writer 2.4.1

I want to change the settings so that when I type "1." and hit enter and TAB, the next line will be "a)" and indented. I know how to change the settings to this. What I don’t know is how to make this the default setting used for every time I open a new document.

Thanks in advance for your help.