I use textpad macros to transform my XML docbooks. Get the docbook xsl from sourceforge as well as a dtd for it.
Get XT to do the transformation.
To run a transformation try:
C:\docbook\bin\xt.exe $File C:\docbook\htmlhelp\xthtmlhelp.xsl
replacing file, of course.
I found a lot of howto's on this. Try searching more and you should be able to figure it out.
Tom