Codes:
 
 32518581
 33534548
 88158744
 23514145
 14518783
 41118181
 44514182
 56158745
 76178741
 85511634 (This one gets you past the infamous Spanish Galleons)
 38511276
 
 You also get all 5 men with these codes.
 
 Skip to Mayan Temple:
 
 Press [F1] at the restore game screen. The password to 
 skip the first twelve levels will be displayed. 
 
 Cheat mode:
 
 Enter one of the following codes to activate the 
 corresponding cheat function.
 
 Effect Code
 
 Display next save password - [Left Shift] + [Right Shift] + [Esc]  
 Instant kill enemies - [Ctrl] + [Alt]  Fire  
 Full power - [Shift]   [Ctrl] + [Alt]  
 Full lives and power - [Shift] + [Ctrl] + [Alt]   inca  
 
 
 During dogfights, you can renew your energy by pressing :
 [Ctrl] [Alt] [LeftShift].
 
 Somebody brought us code 31148226.  
 Not much, but a starter...