This is what all the tga.tx files are, look in the preview file once you have found one that you like.

Blaze - A new skin for Blaze with a scare, and a bronze belt buckle.
flagall - A new flag for the player.
flagall2 - A new flag for the player, with a white background, and 2 eagles.
Loading - A new loading screen with a ship attacking a fort.
new_game - A new-game loading screen with Davy Jones.
sail_torn_white_pirate15 - A new torn sail.
sail_whole_black_pirate16 - A pirate sail with a skull looking at a moon, a star, and a broken heart.
sail_whole_black_pirate17 - A pirate sail with a red skeleton
sail_whole_black_pirate18 - A pirate sail with a skull and crossed bones, and a guy holding a saber and a sand timer. 
sail_whole_black_pirate19 - A pirate sail with a skull above a bone, with a heart to the right and a little dagger to the left.
sail_whole_black_pirate20 - A pirate sail with a heart on top of a skull, with a bone on either side leaning on the skull so they touch the heart.
sail_whole_black_pirate21 - A requested sail with a shark on it.
sail_whole_black_pirate22 - A requested sail with 3 skull and crossed-bones on a 512 x 512 flag.
sail_whole_white_pirate16 - My first sail with my family coat-of-arms on it, a shield with 2 red lions at the top, and a white boar on a red background, at the bottom.
sail_whole_white_pirate17 - A requested sail with an anvil and crossed hammers.
sail_whole_white_pirate18 - A sail with a rising phoenix on it.
sail_whole_white_pirate19 - A sail with crossed swords, and a hawk in front.
sail_whole_white_pirate20 - A sail with crossed swords, and the British flag on the front, it is a 512 x 512 sail.
sail_whole_white_pirate21 - An old sail that has been repaired.
sail_whole_white_pirate22 - A requested sail with the Britania on it.
sail_whole_white_pirate23 - A requested sail with a yellow shield and a black fury hand with 5 red claws in it.
sail_whole_white_pirate24 - A requested sail with the eye of Horus on it.
sail_whole_white_pirate25 - A requested sail with the all seing eye.
sail_whole_white_plain - A requested sail with a newer, cleaner (to me 1800's) look.