How do you out posters in your signature? I want to make mine look awesome! Just need help. Tips?

Um, I don't quite understand the point your trying to say.

I understood what you are asking :P
You want to know how to put images in profile, right?
To put an image, get its link, which you can do by right clicking on the image and clicking Copy Image Location.
Then, in your profile signature, write this
[img*]link[/img]
Replace link with the copied link, and remove the asterisk (*)
Hope it helps.

Go under your account settings and there will be a box where you can add your signature.