Post a Signature (not you!)

[Polaris]

I have a big big big problem, you see. I make some banners and images but I wanna to know how can I post as a signature with my own space?

I've tried to make a shortcut and at the assitant in the colocation on the web but my father show up and he didn't enjoy that too much so I stopped doing that action! It is at the the colocation on the web?

Thanks!