DO NOT POST A QUICK REPLY
Click on Reply and the end of a post and you will get the control panel at the top.
To insert a picture click on the small icon of the tree.
The image has to be hosted somewhere online (you cannot upload from your PC)
Where it says Image URL you need to insert the full www. address etc.
Easy way to do this is to use Firefox, right click on the image you want to insert and select Copy Image Location and paste that into the Image URL box.
IE is not so easy so if someone has a better solution please add your comments. Basically you will have to find the exact location of the image. You need to view the image seperately of any other HTML elements (do a search in google images) and view it independantly, right click to get the properties and the full address (you may already be able to see it in your browser)
You can then play with alignment. You do not need to fill in the other boxes. (click insert)
Don't forget to preview your post (far right icon in middle toolbar) .
Hope this is of help.