You need the 1.1.1 version of Mail from the iPhone (the old one crashes at startup no matter what) and you need /System/Library/PreferenceBundles/MobileMailSettings.bundle from the iPhone. For Maps you need /System/Library/Frameworks/GMM.Framework from the iPhone. Someone here has a blog that has a link to all the apps and all the stuff you need all in one handy link, but that might be considered illegal activity here.