Realized I wrote a guide and figured I'd post it here.
1) If you have an image on your computer that you wanna post, then you have to upload it first. Go to [Only registered and activated users can see links. Click Here To Register...] where it is real easy, and you don't have to sign up for anything. Once uploaded, scroll to the bottom of the page, and copy that address that is in the
"Direct link to image" box. Proceed to step 3.
2) If you find a picture on the internet you want to put up, right click on it and choose "Copy image location."
3) Hit reply in the post, and push the "Img" box and this:
will pop up. Put the cursor between the bracket, and paste.