DOCBOOK-APPS: Using both chunk.xsl and changebars.xsl

Hi,

Is it possible to use both chunk.xsl and changebars.xsl? If I import them 
both, no matter in what order, the changebars stylesheet won't have any effect.

The only workaround I could find was to import changebars.xsl into 
docbook.xsl by adding an <xsl:import> line, and remove the line which 
imports docbook.xsl in changebars.xsl.

Is there a cleaner way to do it?

Thanks in advance.

Raphael