HBDXB,
Just to clarify, yes, you may open up the envelope to scan the transcripts and upload them. Many transcripts will have some sort of tamper-evident mechanism on them to indicate if manipulation has occurred, so I would not worry so much about keeping the transcripts sealed in the envelope.
I suppose that, in a worst case scenario, you could request new copies?
Regards,
Victor M. Lee
MBA Candidate, Class of 2011