Here is a link for a video overview of the CSP templates
To use the CSP branded html templates begin by clicking on the module you'd like to add your content to and click "Create New" at the top right of the page.
Next, click on "Page"
Click on the "Select Template" dropdown, then the type of template.
After the template loads, click on the "full-screen" arrows at the top right of the html editor
To replace an image, click on it, then click on the "insert stuff" button
Click on "My Computer" to browse for the image and upload it.
When prompted for "Link Text" and "Alternative Text" simply check the "This is decorative" box and the blue "Insert" button.
Replace the text in the template by pasting with Ctrl+Shift+V (Cmd+Shift+V on Mac). Click on the "full-screen" arrows at the top right of the editor when finished and then click the blue "Save and Close" button.