Well I will try to tell you how I do it !!
I have an account at photo bucket it is free !!
You can go here and open you an account .
http://photobucket.com/Then you can upload pic's to your photo album .
Down below your pic you will see
Url
Tag
Img ( this is the link you want to copy and past in you post on here )
and Wha-La you pic will show up in your post.
If you have any problems Holler at me and I will try to help you more
Here is an example
I copied the img code and pasted it over here