If you'd like to create a Custom Page with images the best way to do that is to upload the images to a third party image host, like imgur.com, then link them to the page. Here are the steps to follow:
Upload image to imgur.com, by clicking the New Post button at the top
Right click on the image, in imgur, and click Copy Image Address
On your Custom Page, in AmmoReady, click the Insert/edit Image button
Paste the URL, and set the width/height
Click ok, and repeat for other images