If someone want to show more than 5 new product in home page.
http://www.magentocommerce.com/boards/viewthread/16287/P0/

Try This…
This example to show 10 items in 2 rows 5 products each.

You need to change the line in \app\code\core\Mage\Catalog\Block\Product\New.php
$products->setOrder(’news_from_date’)->setPageSize(5)->setCurPage(1);
change to
$products->setOrder(’news_from_date’)->setPageSize(10)->setCurPage(1);

Andneed to change new.phtml
<?php if ($i>5): continue; endif; ?>
change to
<?php if ($i==5):  echo “</tr><tr>”; endif; ?>
<?php if ($i>9): continue; endif; ?>

Good luck….

他说的是在magento核心文件里面改，这个不赞成，在local下面建立一个自己的模块，重写New.php吧