1- The author is supposedly working on the walkthrough. It will be ready if and when it's ready.
2- To my knowledge, there is currently no way to get the passport to the Orc city. You can get in, though, by taking revenge on Sarah (Follow the Brothel story while NOT being a goblin cum addict, during that you'll go to a church, she can swallow goblin cum and get addicted, or supposedly you can gather the cum and mix it in her drink when you're wenching. Make sure you follow the Witch's plan to deal with the succubus, not Sarah's.) and getting her addicted to Goblin cum, then taking her to Bogwart and waiting three days. When you go to Bogwart again, he takes you to the city here Sarah (and Sophie if you didn't save her) are his bimbo cumslut slaves. Currently, the only things you can do in the orc city are you can be milked like a cow, and you can visit a glory hole for some scenes. There's supposed to be something where you have a bed there in a cage, but it's not firing. Maybe it does in 1.6.4, but we don't have access to that here.