XF 1.5 Tags as Pictures


I know this is possible because I saw it on a website and it was not customly done, because the owner explained it to me but instead of [Owner] on forums like shown: http://prntscr.com/94ahue but replace the staff member tag and owner tag with a picture.

Could you provide me with the paths where to upload the images and stuff? Thanks!

Be as simple as possible, I'm an extreme noob with web-development!