Compiling chapter 2 example from "The Definitive Guide to the Xen" book

When compiling on a PAE enabled Xen hypvervisor, you will get follwing error:

"guest type xen-3.0-x86_32 not supported by xen kernel"

Solution: modify the bootstrap.x86_32.S file, change "PAE=no" to "PAE=yes".