In your previous post, you've inlined a hot-linked image. An image hosted by a 3rd party. If you need to host the image yourself, through attached files, you have a couple of options.
The first one I've already mentioned.
The other is more useful for when you have a batch of images, which can be done by archiving them in to a ZIP or RAR file.
And finally, which I tend to use all over my forums, is to compile all of the images that are clearly documents (exactly as your post is using for an example) in to a PDF file. And then attach the PDF to your post. The inline PDF viewer built in to UBB.threads 7.6.2+ can easily handle that. It will display multiple pages in order, and allow zooming in and out, and because it is a PDF, It is printer friendly.