The best method for this is:
1) open /Pliggfolder/templates/<yourtemplate>/sidebar_modules/rss.tpl
Change the RSS-links to this:
Code:
<li><a href="{$my_pligg_base}/rss/popular" target="_blank">{#PLIGG_Visual_RSS_Published#}</a></li>
<li><a href="{$my_pligg_base}/rss/queued" target="_blank">{#PLIGG_Visual_RSS_Queued#}</a></li>
<li><a href="{$my_pligg_base}/rss/all" target="_blank">{#PLIGG_Visual_RSS_All#}</a></li>
2) open /Pliggfolder/templates/<yourtemplate>/pligg.tpl
Change the RSS link:
Code:
<link rel="alternate" type="application/rss+xml" title="RSS 2.0" href="http://{$server_name}{$my_pligg_base}/rss/popular"/>
3) add this to your .htaccess file
Code:
Redirect /rss/popular http://feeds.feedburner.com/<yourfeed>-popular
Redirect /rss/queued http://feeds.feedburner.com/<yourfeed>-queued
Redirect /rss/all http://feeds.feedburner.com/<yourfeed>-all
NOTE: I did the redirect with the htaccess, so you can easily change the feed URL to another service if you want and your feed-users can keep the same feed URL.