Sorry but you can not modify it unless you know php. There is no point in having avatars if the forums don't show the avatar of the person who creates it, not just the name. The avatar of the last person to post in the left is good but you need to show in the right side of the person who creates it since it like a topic identifier. I will choose another board provider that does this though I have already bought this product. The other provider has less features but if it doesn't show the avatar of the user who created than I won't get much members.