I googled "Can't locate XML/XPath.pm" and found this so I tried to rip/replace XML::XPath with XML::LibXML and poof* H:\programmer\perl>perl find-hostname.pl Can't locate object method "find" via package "XML::LibXML" at find-hostname.pl line 9.

use XML::LibXML;
 
my $file = 'y:\tmp\open\HP1.xml';
my $xp = XML::LibXML->new(filename=>$file);
 
# An XML::XPath nodeset is an object which contains the result of
# smacking an XML document with an XPath expression; we'll do just
# this, and then query the nodeset to see what we get.
my $nodeset = $xp->find('//IPHostname');
[download]

so I don't think the 2 libraries are equiv. :)