Simple method would be to put a text box in your header that would cover the space and set for text to wrap around it tight. Put a second text box in the footer that would be about 2 inches high (experiment).

Both text boxes would not have outlines or fill. Such text boxes are demonstrated for letterhead in the Letterhead textboxes and styles tutorial you can download from my site.

Tutorials

In answer to your immediate question, though, you could scan the page in as a jpg or other image file and put it in the header behind text and set your print settings to not print graphics or delete it after you have spaced your text.