I think you need to ask your client more questions. It sounds as if he’s describing a CD-ROM or DVD-ROM with an auto executable file, but that’s just crazy talk. It opens up the “end user” pandora’s box.
COMPRESSOR encodes MPEG video and AIFF audio separately and then you must mux it together. I haven’t done anything like that in years and never with COMPRESSOR files. COMPRESSSOR was designed to make files (audio and video) that would then be brought into a DVD authoring program like DVD studio pro. That’s where the muxing normally happens, when your building the VIDEO TS folder contents before burning to disk.
I would suggest talking your client into a normally authored DVD and then make sure it’s authored to play in the appropriate zones for DVD playback where ever he’s going. A DVD, if authored correctly, will behave exactly the way he describes what he’s asked you to give, but with a lot less hassle.
You need to ask your client to explain EXACTLY (what’s he playing this disc in? Is that device feeding an external monitor? Is it for large group, or will they be huddled around his laptop? Does this device play DVD’s?) how he’s planning on using these files. It’s the only way to understand if that’s what he really needs. If he insists on what you described in your original post, I’m sorry, this has been no help.