Here is a script I wrote to find and replace things on linux. You might be able to modify it for windows if you install perl, but Im not sure.

gistfile1.txt

#!/usr/bin/perl
print "Find\n";  ##this defines what you are searching for, it will be inserted into a regex expression, so escape character if needed
$test1 = <STDIN>;
chomp $test1;

print "Replace\n";  ##this defines what you will replace the previous string with, also in regex so escape special characters
$test2 = <STDIN>;
chomp $test2;

print "Where\n";  ##where you want it to look. ie. ~/Desktop/test (this will search all files in the directory and its subdirectories)
$test3 = <STDIN>;
chomp $test3;

print "Type\n";  ##this determins the type of file you want to search. ie. xml (leave this blank and it will search all files)
$test4 = <STDIN>;
chomp $test4;

if ($test4) {
	$test5 = " -name *.$test4)";
} else {
	$test5 = ")";
}

print "Find $test1 and replace with $test2 in $test3\n";
system "perl -e \"s/$test1/$test2/g;\" -pi \$(find $test3 -type f$test5";