To make an archive of the whole project, the easiest way is to use the make_dist.script.
It should be in C::B's share/scripts subfolder.
You can enable it via "Settings -> Scripting".
It adds an entry to the "Project"-menu ("Create package for distribution") and needs either zip or tar and gzip or tar and bzip2 executables in path.
If you want to use one of the last two options, you have to edit the script before enabling it (line 21 to 29, self explaining).
And the version of C::B must be less than 7588 (broken since than, fix will be committed soon, after some testing).