threads will not be used, regardless of this parameter, since no compression
needs to be done in this case.
.TP
+\fB--rebuild\fR
+For \fBimagex append\fR: rebuild the entire WIM rather than appending an image
+to the end of it. Rebuilding the WIM is slower, but will save a little bit of
+space that would otherwise be left as a hole in the WIM. Also see \fBimagex
+optimize\fR.
+.TP
\fB--flags\fR=\fIEDITIONID\fR
Specify a string to use in the <FLAGS> element of the XML data for the new
image.