I build it using the visual studios files that come with the sources.
I found this:
The Boost filesystem library is used in the DOM automated tests and in the DOM itself to handle temporary files created for ZAE archives (since SVN revison 637). The DOM ships with Boost 1.35. Starting with Boost 1.35 the Filesystem library depends on the System library, so the DOM also needs Boost System.
So I guess .zae files aren't that important for loading info in the engine....
And automated tests aren't important too I guess?