Hi Ming,

Steve mentioned a few uses with the xml file, but I thought I'd point out the user guide as well.  Appendix A on page 40 lists all of the tokens you can use for the templates, headers, etc.  It can be found at http://www.dotnetnuke.com/Development...

There's a lot on the setup portion, but if you want to see the other tokens/options available check it out.  I found it very helpful when setting up my files.