Creating a gallery

Hi there

I want to create a gallery on a post and display it as follows:

<div id="screenshots">
		<img src="images/cases/case_1.jpg" width="690" height="650" alt="Case 1">
		<img src="images/cases/case_2.jpg" width="690" height="650" alt="Case 2">
		<img src="images/cases/case_3.jpg" width="690" height="650" alt="Case 3">
		<img src="images/cases/case_4.jpg" width="690" height="650" alt="Case 4">
	</div>

Do I manually have to do this code in tinymce after having uploaded the images to the post?