To add an image to a HTML document you use the <img> tag.

Example: <img src="html5.png" alt="HTML5 Icon" width="200" height="200">

You can also specify the image dimensions using inline styles.

Example: <img src="html5.png" alt="HTML5 Icon" style="width:200px;height:200px;">

You don't need to defrag the system reserve but if you want to anyway there is a program called auslogis disk defrag that lets you defrag system reserve

Defrag

depends on the OS, but for most it is :

defrag <DRIVE>

example:

defrag c:

I use Axialis Icon Workshop. It works great with png images and even converts with transparency. If it is another type of image, for instance a bitmap, it may look crappy but Axialis will probably do one of the best jobs.