It is the exact same way that you put the picture in there now. I think on a pc you'll just right click on the picture of the signature I made and it will give you a little option box. You will click save to as or something like that.
Then you will go to your "edit signature" in the "user pc". You will go down to browse in the "edit signature" section and then you will find where you saved that picture. I saved the file as your screen name so look for that title.
Once you have selected it and hit the "preview" button you will see it is in the little window under the text box. Push the little orange words that say to insert the picture. You will see that it gave you the code in the text box. Copy the code and put it in the text box in the position where you want everything to appear.
That should be everything. I am a little tired right now so I may have missed something but I think that's it.
Yeah I can take out the connecting rod if you want now. Looking at it it is kind of bugging me. It takes down the readability of the MP2Performance. I thought shop name that looked pretty cool too when I did it. I am a type guy though. It's the career I chose.