Create a Bluray Movie+Storage.

[Bullet7314]

Hi, I felt the need to hop on this old, unused account, in hopes someone here can answer this question. So to start, I feel I need to explain my preferences. I like quality, so I obviously love bluray. However, the inevitable question I always face is where to go when a movie or show I'm looking for is not available in Bluray, or subsequent media. I've come up with an order for priority of purchase. Bluray>Itunes HD>DVD>Itunes SD.
I want to know if it is at all possible, to take a video file, encode/burn it for bluray viewing on a bluray disc, but also include the video file itself on the disc, as a method of storage. When dealing with Itunes, I don't want to rely on Itunes when going back to the source. So I want a disc source, that is viewable on bluray players. Itunes HD on average is set to 5-6 mbps, so having a duplicate of the movie, in mp4 on the disc should not be a size issue, ut how would I go about adding it during the encoding, since IIRC, once you burn it, adding files to a disc is a moot option. Thank you for any insight you can offer!