Click on 'Insert,' again at the top of MS Word. When the menu appears, let your mouse arrow hover over 'Picture.' Here you'll have several options. You can create your letterhead on the fly using some of those options. However, for our purposes we'll opt to choose 'From File,' since we already have a ready graphic. Click on the option, 'From File,' and a dialogue box opens. Locate your graphic and then click on it and then click the 'Insert' button. Your graphic will then appear inside the dotted box.
You can create professional looking web form templates, just clicking a few times on word. Couldn't believe, right? YES, you can use Microsoft word to create professional form templates for your site. Definitely, it will be a plain one, with no visual interfaces, but this will work like a professional form, trust me!