How can I publish a page to more than one child publication at a time using the SDL Tridion 2009 GUI?
Here is an example of what I want to achieve: I have a Publication called "Global" with a Page called home.aspx and then two child Publications (UK and USA). I want to publish both child home.aspx pages at the same time, is it possible?
If you want to publish the same page in multiple child publications, click on the advanced tab of the publish dialog, and check the "also publish in child publications" check box.
There is more information on this approach in this post http://www.tridiondeveloper.com/no-faking-publish-from-a-parent-publication-without-faking-a-publication-target.
Depending on whether your parent publication should actually be published, you may want to consider one of the Custom Resolver or Event System solutions offered by John Winter or Nickoli Roussakov in the other answers on this page.