K, first you need a picture. I assume you have one. Preferably a Jpeg or Gif.

Next you use a web host. This is a web site that hosts individual web pages and or pictures. I use photobucket.com.

You will need to register. If memory serves correct, you will need an email to register. Follow there steps.

When done registring you log in to your account and choose to upload your picture.

When done you need to copy the code that looks like < img src="picture name.whatever" > beneath the picture's icon.

Now go to MortalKombatonline.com, log in. Up toward the left where it says settings: click on that.

In the signature text box paste that code you copied and then click submit.

***Now you if you get any errors feel free to PM me and I will help you from there.
Done.