my $pre = '\xe9';
my $post = '\x65';
my $re  = qr/s\/$pre\/$post\/g/;

my $path = 'C:\Scripts\Working2';
my $fileSep = "\\";
my $file = 'Users_0.xml';
my $tempFile = 'C:\Scripts\Working2\Users2.xml';

if (!open(IF, "<$path$fileSep$file")) {
	die("Could not open file $path$fileSep$file $!");
}
if (!open(OF, ">$tempFile")) {
	die("Could not open file $tempFile $!");
}	

while($str = <IF>) {
	$str =~ $re;
	print OF $str;
}
close IF;
close OF;