Here is where you upload photos to your gallery:
To add them to a thread/post:
Then click the "My Gallery" link. If you don't see it, click on the "Pictures" Link at the top.
Click on the one you want to post:
Now you get this:
If this is big enough for you, you can continue on. If you want the larger version, just click on the image (like the text says).
Right click on the image, and click properties:
This window comes up:
Select the circled text. Right click, and click copy.
Now, in your post type this where you want the image:
You right click, and click paste where it says "(rightclick, paste)". You do not type the periods (.). They were just put in this post so that it would not try to post an image.
So, if I wanted to put my picture in a thread, this is what it would look like: