I know textures are used to make headers like the one below, but I never got the hang of textures. So my question is, how do you make headers like these:

http://www.gaiaonline.com/profile/index.php?view=profile.ShowProfile&item=13138

http://www.gaiaonline.com/gaia/redirect.php?r=http%3A%2F%2Fi58.photobucket.com%2Falbums%2Fg258%2Fesmerai%2F7thsense.jpg

http://www.gaiaonline.com/gaia/redirect.php?r=http%3A%2F%2Fi58.photobucket.com%2Falbums%2Fg258%2Fesmerai%2Fmind.jpg

http://www.gaiaonline.com/gaia/redirect.php?r=http%3A%2F%2Fi58.photobucket.com%2Falbums%2Fg258%2Fesmerai%2Fpidgey.jpg