Hi,
In app/etc/modules folder.
You will have a Mage_All.xml file that contains the bulk of the Magento core module declarations.
Look for the Mage_Rss section and change the tag to <active>false</active>,
<Mage_Rss>
<active>true</active>
<codePool>core</codePool>
<depends>
<Mage_Catalog/>
<Mage_CatalogInventory/>
<Mage_Sales/>
<Mage_SalesRule/>
<Mage_Wishlist/>
</depends>
</Mage_Rss>
Thanks
Jigneshkumar
iFour Technolab Pvt. Ltd.