Help with Google Maps

I'm so glad this tutorial is here. Before I get started, can you tell me if the instructions are the same if I want to show a map for just one record on a details viewer page?

UPDATE:
Awaiting your answer, but in the meantime I've made some progress.

Instead of the list code, I generated the header for the detail page.

Then, to center my map on the same point for which my record needs a marker, I used this code:

<?php foreach ($listingsRecords as $record): ?>


map.setCenter(new GLatLng(<?php echo $record['latitude'] ?>,<?php echo $record['longitude'] ?>), 13);
var point = new GLatLng(<?php echo $record['latitude'] ?>,<?php echo $record['longitude'] ?>);
var marker = createMarker(point,'<?php echo htmlspecialchars($record['street_address'], ENT_QUOTES) ?>, <?php echo htmlspecialchars($record['city'], ENT_QUOTES) ?>')
map.addOverlay(marker);

<?php endforeach; ?>

}

Okay, so my map is working when I load record number from end of url i.e. map.php?address-field-1
Can you tell me how to call the iframe from listingsDetail.php in a way that dynamically loads the correct map.

Will this approach work? Is there a better way?
Why do I need the iframe? Can't I just load the map on the same listingsDetail.php?address-field-1 page?