Not familiar with Open Office.
I suspect that a combination of templates and AutoText would meet your goal.
Templates in Microsoft Word
Automated Boilerplate Using Microsoft Word

Learn to use Styles, including the Header and Footer Styles. In a document with both portrait and landscape pages you might want to have Header-Lanscape and Footer-Landscape styles. Understanding Styles in Microsoft Word
Any time you spend learning about Styles in Word will be time well-spent and quickly recovered in increased productivity.

Each section in Word can have different Headers/footers. Switching from portrait to landscape and back means section breaks even if you don't say anything about them. Sections / Headers and Footers in Microsoft Word 2007-2010