An ‘extended’ version of the OT already exists that incorporates all the deleted scenes from the 2004 DVD, I believe ADigitalMan made it, there may or may not be an updated version that includes the 2011 BD exclusive scenes.
So I’m not exactly sure what you’re asking/making? Someone has already made an extended version.
If there’s something else you’re going to include that hasn’t been done before please outline what you’re going to do, because I’m quite puzzled.