Contents:
Internet Explorer
Unfortunately Internet Explorer doesn't provide a way to configure an alternative RSS reader (version 7 is the latest version at time of writing, this may have changed since then), so the simplest way to subscribe to a feed in an alternative reader such as Pheedstorm is to copy and paste the feed URL. When you have found a site that you want to subscribe to, look for the orange feed icon like this:
Clicking on this picture should pull up the RSS feed for the site, try clicking the icon above which brings the BBC site.
What you need to do is copy the feed URL at the top of the screen which looks like this:
Select the whole URL using your mouse and copy it to the clipboard by pressing CTRL-C. Then open up Pheedstorm's config window and click into the "Add feed" textbox as shown below. Press CTRL-V to copy the URL into the textbox, then click the "Add feed" button to add the feed to your subscription list.
Alternatively, you may be able to drag and drop an RSS icon from Internet Explorer into the main Pheedstorm window (or the list of feeds on the Config window).
Firefox
Firefox allows you to configure any application you like as your RSS reader, and once you have done this, clicking on the RSS image on any website should automatically add that site to your subscriptions. The instructions below show you how to set this up:
Select the menu option Tools....Options. Then click on the Applications tab. Scroll down to the option "Web feed" and click on the dropdown box to the right. Choose "Use other", then click "Browse". Locate "pheedstorm.exe" and select it. When you return to the list of applications it should look like the screenshot below. The next time you click on a feed, Pheedstorm will automatically add it to the subscriptions list.
The instructions above work for Firefox 3.x. If you have an older version the procedure is slightly different, see http://labnol.blogspot.com/2006/07/firefox-20-tutorial-add-new-rss.html