If anyone wants to see the site plan for MSC, you can click on this link:
http://lawa.granicus.com/MetaViewer....&meta_id=21901
See page 4
Also, the map on this page will give you a sense of distance from the main concourse to the satellite concourse:
http://www.lawa.org/MSCNorth/theproject.aspx
It's about the same as T4 concourse to T5 concourse... so maybe a 6 or 7 minute walk from TBIT Main to TBIT MSC, which will be connected with tunnels.