Not the End
In the spirit of iterative development, the end is not the end! Making XP work for you is going to mean refining the implementation to suit your local context. The values are your bedrock and the practices should be your tools. Index cards or Word documents for user stories? Planning game or initiation meeting? Don't let the tribal language sidetrack your implementation, and be prepared to give in on a few lesser battles with management in the quest for XP acceptance. Create your own rituals, spend time getting a solid toolset together, and avoid mindless arguments about rigor versus agile. You'll be too busy celebrating your XP success to become embroiled in methodology debates.
Oh, one last thing: Just go.