Home page query

Hi,
I’m looking to display only posts with a certain tag on my homepage. I looked in Codex and saw that using a query such as this below would do the trick. Where do I put this query? Home.php or Index.php? Any particular location? Does this php query look right?

<?php
if (is_home()) {
query_posts(‘tag=Volume 6 • Issue 1 • May 2009’);
}
?>

Obviously I’d like the homepage to display only posts with the tag Volume 6 • Issue 1 • May 2009. Please help.