Can I manually add an RSS source to My Yahoo!? Yes, you can quickly add any RSS source to My Yahoo! If you find what you are looking for using the Add Content tools, just click “add.” If you want to add RSS source not currently found on My Yahoo!, you can do that too. Follow these simple steps: 
Go to the site or do a quick web search if you don’t know it. 
Look for a little orange button like this: . This indicates the site syndicates its content. Usually, the button points directly to the site’s RSS file. (The page looks like raw code, but don’t let it scare you!) 
To find the RSS URL, right-click on the orange XML button to “Copy Shortcut.” Or click on the “XML” button and use “Ctrl-C” on your keyboard to copy the URL found in the address bar of your browser. 
Return to My Yahoo!’s “Add RSS” page, use “Ctrl-V” to paste the URL into the field above, and click “add.” 
A valid RSS URL will take you to a preview page where you can see how the module will look on your page. If you like what you see, confirm by clicking “Add.” 
Congratulations! You’ve just added a new feed to your page.