XF 1.2 4 sections rss feed?

[eagle eyes]

How do i merge 4 sections into 1 RSS feed?

Right now on home page each section have their own RSS feed. I want to be able to choose by ids which sections will have their rss combined.

http://xenforo.com/community/forums/rssfeed.xml=33,24,52

etc # are forum ids

 

[Mike]

This would require an add-on/custom code.