The short answer is that you cannot post pictures here. The images you see in other peoples posts have been uploaded to other websites, then an images link is added the forums post and the image shows up in the post. To do that you click the little img button above and past the URL of your image inside of that.
There are hundreds of websites that will allow you to upload images, but only a few allow that image to be linked too by other websites.
Here is a site that you can use to upload your image:
http://i86.photobucket.com1. upload you image to
http://i86.photobucket.com.
2. open you image on photobucket right click and copy image link
3 past the link in the image tags on this forum
example:
Code:
[img]http://myimageonsomesite[/img]