The easiest way to add a SHOUTcast Widget to your Wordpress is using the standard IFRAME code.
1. Login to your SHOUTcast Widgets and copy the code onto your clipboard.
2. Login to your Wordpress ADMIN and find a post (left menu POSTS >  ALL POSTS or you can simply create a new post)
3. Choose EDIT for the post you would like to add the code to, on the page that open click on "TEXT" in the text editor.
4. Paste the code where ever you want the widget to be, then click update.