Change the appearance of the post and side profile

My Forum: http://lucianomicle.foroactivo.com/
The version of my Forum: PhpBB3

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Hello people!
I have a doubt that I want to achieve, but I end up disarming the whole forum.
What I want to achieve is to change the appearance of the post, and that the .postprofile appears outside the text and title of the subject.

How do I have it::

How I want to have it::

I don't have much custom template, but I wanted the solution to come from there or I don't know. (my way of thinking, I want a response from a professional)-I hope you can help me, regards. LucianoMicle-

hello

since your forum is in Spanish please contact the Spanish support forum for help
i can see you are already an active member there

Ok, thanks!