As far as I know there is no third party strategy guide for the apolyton pack. If you bloodbath a city you get some gold and PW bonus it is based on the city size. Unfortunatly it gives you also a diplomacy regard hit, -50 regard for the next 50 turns if I remember correctly. So if you bloodbath a lot of cities don't expect to have good relationships with the other civs in the near future. Alternativly you can enslave the whole population or resettle the inhabitants if this slavery abolish wonder is built.
Whenever a city is captured PW and Gold is stolen from the victim civ ala Civ2.
Well if you need more pieces of information about the other fiture just ask. Well the additional city styles and the leader picture on the parchments are obvious. There are also some tweaks of the terrain boni unfortunatly Dale never bothered to document it in the readme, therefore I never considered them in the Great Libary. He also changed the advance costs so that you have problems to achieve the science victory without scientists.
By the way if you haven't already voted in the
Apolyton Hall of Fame: December 2003 vote now.
-Martin