oh you were thinking about Revolutions, the console civ. (civ2 was also on ps1 hehe).
No, it doesn't have much to do with CIV at all, not sure this should even be in the BTS forums
Colonization was after original civ, before civnet. It has the same sort of turn based, tile based, city based, unit based gameplay as civ. Your citizens have speciaties though, and you actually harvest raw resources from tiles worked, to be used in creating goods... So you would have a colonist work as a lumberjack to get wood, for a carpenter to use that goes into production. Or a sugar planter that yields sugar from a tile, the sugar is used by a Distiller who makes rum, you then sell the rum to europe, natives, or other europeans in the new world.
Bleh there is alot more to it, but basicly you are trying to gain independance from the home country.
P.S.
Privateers were so cool cause you could steal cargo off of enemy ships muaha. Oh and fortresses that have an artillery unit in them would auto bombard passing ships too
I guess it's just titled Civ IV because of the engine. Fun game though, I hope the new one does it justice.