Profile Customization
Design and Skin Customization
Please don't post the same post 3 times. I've deleted the other two.
The module your interested in is probably the "Profile Tweaks" module here:
https://www.jamroom.net/the-jamroom-network/networkmarket/2/profile-tweaks
That will allow individual profiles to adjust their profile look.
As for where the profile image is, it depends on what skin you are using, but I would start by looking at to see if there is a 'profile_header.tpl' file for your skin, its probably in there.