How do we embed projector and supporting files within an XCode project/app?

Question

Many Director 12 developers would like to put their projects into the Mac App Store, and I'm one of them. It seems to me that the safest way to meet Apple's various requirements (sandbox, receipt validation, and whatever Apple adds in the future) is to somehow use Apple's own tool: Xcode.
Which web pages out there explain how to add/embed a Macintosh application (Director 12 projector) and supporting files (movies, casts, sound files, etc) within an XCode project and resulting app?
I got no obviously right results with Google searching. I might have chosen the wrong keywords to search for.
I searched this forum and found some posts about preparing for the Mac App Store, but those answers seem to be either out-of-date or very incomplete for this purpose.
Huge thanks to anyone out there who can point me in the right direction!

Answer 1

So receipt validation should be implemented via an Xtra? Then I must hire a Xtras developer, because I don't know the C++ programming language nor Objective-C/Xcode.
Maybe I should ask that developer to implement this:
https://github.com/roddi/ValidateStoreReceipt
I must decide whether to have all the receipt validation logic coded in the Xtra, or simply have the Xtra access the receipt and then I would code all the receipt validation using Lingo. Perhaps having all that coded in C++ would be more secure against hackers, but I lack the technical knowledge to be sure. Doing the validation in Lingo would make it easy to change that validation Lingo code for each product I put in the App Store; Apple asks developers to change and obfuscate validation code, to make hacking more time consuming I guess.
I read a forum message somewhere here, that hinted third-party Xtras could create issues with code signing? Does anybody have experience with that?
Plus there is the whole issue of sandboxing. I think my apps will need no entitlements at all. Do I need to indicate that fact, somehow, somewhere? Some of my apps use the Lingo getPref and setPref commands, but I think that does not require an entitlement. I'm not doing anything special at this point, but might want to make use of Game Center and In-App purchases later.
And then there is this whole business:
http://forums.adobe.com/message/5755957#5755957
It seems to me that we on these forums should be discussing all these kinds of issues in detail. It is both very complicated and very important for the many Director developers who would like to publish to the Mac App Store.
I think Adobe could sell more copies of Director 12 to aspiring App Store publishers, if they contributed to their customers' understanding of these issues. But maybe the Adobe people don't have special knowledge on this topic. I fear that we are on our own.