DOCBOOK-APPS: How to change alignment on an external graphic?

Hi,

I am trying to ensure that an external graphic that I want in the headers
and footers turns up correctly on either side of the page.

What I want to do is the following:

 display-alignment: (if-front-page 'start 'end)

But OpenJade 1.3 is telling me that the arguments to if-front-page are of
the wrong type, they should be sosofos ...

How can I do what I want?

Regards
-------
Richard Sharpe, 
Samba (Team member, www.samba.org), Ethereal (Team member, www.ethereal.com)
Contributing author, SAMS Teach Yourself Samba in 24 Hours
Author, Special Edition, Using Samba