Readme:
Create a new folder, Barbary Corsair Galley in your art/units folder and unzip all the files to that folder. Then copy and paste the CorsairGalleyLarge.pcx and CorsairGalleySmall.pcx into your art/civilopedia/icons/units folder. Then open up the CorairGalley32.pcx with an image editor, back-up your units_32.pcx and open it with an image editing program. Paste the image into a square at the end of the other icons, be sure to line it up correctly. Finally, backup your PediaIcons text and Civilopedia text. Then copy and paste the appropriate text below into its respective places (feel free to change the Civilopedia description, this is only my version). Finally, open up your scenario in the civ3-editor and add the unit (if you need help with this part, look around in the tutorials forum, I made this quick tutorial because some people organize their units differently).

Enjoy! 

Note: In the file is included a second attack animation (a cannon attack), which is not included in the ini file. To include this, add Barbary Corsair GalleyAttackB.flc in the "Animations" section and Barbary Corsair GalleyAttackB.wav in the "Sound Effects" section of the ini file.

PediaIcons

#start units
art\civilopedia\icons\units\Barbary Corsair GalleyLarge.pcx
art\civilopedia\icons\units\Barbary Corsair GalleySmall.pcx

# Unit animations
#ANIMNAME_PRTO_Barbary Corsair Galley
Barbary Corsair Galley


Civilopedia (Standard)

#PRTO_Barbary Corsair Galley
^
^[Barbary Corsair Galleys] are oar powered pirating vessels of North Africa. Being pirates, they [carry no national markings]. 
^ 
^A coastal city needs both $LINK<iron=GOOD_Iron> and $LINK<saltpeter=GOOD_Saltpeter> in its $LINK<Strategic Resource=GCON_ResourcesS> box to build a Barbary Corsair Galley.
^
#DESC_PRTO_Barbary Corsair Galley
^
^
^ From the 11th up until the 19th century, pirates preyed upon the mediterranean from an area known as the Barbary Coast. These pirates frequently raided ships and coastal towns of Western Europe, capturing many slaves to be sold or used to row the pirate's galleys. Many of these pirates were successful enough to own their own palaces in Africa, which became bases for these pirates.
^ The Barabary pirates reign was brought to an end in 1816 after the Royal Navy raided a main Barbary port and destroyed the fleet there. 