Login to the admin area of your Magento store, hover over the menu option "CMS" and select "Pages".
Click the images to view a larger copy.
Click "Add New Page" in the top right of the list overview.
Complete the "Page Information" section with your desired Page Title, URL & Store.
Now click the "Content" option on the left menu. Click the Show/Hide Editor to view the flat text box with the raw HTML.
Paste your Kit Builder script into this box (Demo code can be found here).
Now click the "Design" option on the left menu. Ensure the "Layout" option has been set to have "1 Column" or a similar wide template.
Visit the new page you have just created, the url should be similar to this: yourwebsite.com/your-url
If you have any issues when inserting the Kit Builder into your Magento website please let us know click here. Remember to include as much detail as possible & a link to your website.