Adding different headers and footers to different pages - in Word 2007

First of all you need to add the section breaks, so that you can clearly add different headers and footers for different sections.

This is the way to add section breaks to your document.

Click on the page that you want to END a section.

Go to Page Layout ribbon and select Breaks from Page Setup panel.

Select Next Page from the option tiles.

Now you have sectioned your document.

You can check whether you have done your task correctly. For this purpose, click on each page. Then examine the bottom right of your word document. So you can see the section you are in. 

I'm in Section: 2. See below.

Now you can start to add and edit your headers and footers. I'll give an example to add different headers. Adding different footers are done similarly.

Go to Insert ribbon, find Header panel and select Edit Header.
Try to add a general header, so that it will appear in every section you have created.

Go to Page Layout ribbon. From the Page Setup panel, click on the little arrow with the square.

You will land at the page setup window. Go to Layout tab in the Page Setup window.

You can select Different first page check box from the headers and footers and choose From this point forward to separately add a header to the document.

Or else here is a more clear way. You can click on the header in each section and select This Section from the Layout tab at the Page Setup window.

Now you can modify your header according to the sections you have already created. Click on the header in each section and edit the header accordingly. And remember to deselect the Link to Previous button before editing the header for each section.

So now you have completed the task !!!