I honestly don't know what you have in terms of image upload. I think we have most of it. And I was pretty clear about this upload thing but for the benefit of the doubt I'll do it again:
Click here. It's on every page on the wiki, in the box under the sidebar menu.
Fill up the empty spaces. You can click on choose to pick a file, and you can change the destination file name as long as they have the same extension, i.e. png
Click Upload File when you are done.
It should look something like this if it's right.