So you have learn something new/more about msi.
Well, no, nothing that I didn't already know...
I looked that picture and there are no filenames except few cab names.
What other filenames do you expect?
The cabs contain the actually to instal files (which will be visible if you click on the CAB files within 7Zip (or WinZIP, WinRAR, etc), as those are nothing but ZIP files them self...
And those !?
? files are the rules files for the installer.
Beside that, now that I searched for LessMSI, I am even more confused as to what you are actually looking for.
After all, LessMSI is an Open Source program at Google Code, so what exactly now is your problem looking for a program to examine .msi files? (And the .MSI file format description is somewhere in the MS Windows SDK, AFAIK)
Ralf