You can add them to your profile through the gallery.
Click on Gallery at the top of the page.
Try to find and click a link called "your gallery homepage".
You should see some sort of link that says something about uploading some images to the gallery.Click on that.
Then, you will wind up in another page where you will find a few text boxes with a box that says "Browse" next to it.
Click on browse, and you can choose what pics from your computer you want to put into your gallery.
Once you have all the pictures you would like to add, there should be some sort of confirmation button.
Click that and the pics will be uploaded.
That, or if you already have them uploaded somewhere like a blog or have already uploaded them here, when you write a post, you will see a small tab where the bold, italics, and underlined tabs are called images.
Press the image tab and you'll get something like this: [img].
Press it again and you get this: [/img]
Find the URL to the picture and put it between the
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.
Now, I'm not the best person at explaining stuff so if you still don't really know how to do it, Nuts and Bolts is a good place to ask questions about the website.