Putting activty centered in showthread beside username and postbit

[koolfire]

Modification is located here.. - https://vborg.vbsupport.ru/showthread.php?t=93831

I want it with images..

Right centered from postbit and username like in between it with width and height image will exactly shwo what i am trying to say..



Which template to edit and WHERE to put the code?

The instructions are given when you download activity instructions.html or whatever file..

Thanks alot!!!!!!!!!