creating RSS feeds from Google or Yahoo search

Hi, the url 
the url
both result in rss feeds. The yahoo one gives a feed from a regular search but the google one only queries the news. Is there any way to focus these to say only newsgroups or only blogs or only newspapers(I guess the google one is sort of limited to newspapers but it I think it does not go back in history very far)
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Kshitij AhujaTechnology DeveloperCommented:
One way is to select the specific group you want to provide in feeds. It is as simple as it sounds. However you may not get desired format or content in RSS as in case of Google. In that case, you can use their custom search engines to get results from websites of your choice and present them to your users for subscription. Incase the website you want to provide as feed does not itself provides feeds, you may well require to go for a custom script that will convert results from that website into RSS and then feed to your users.

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