How to integrate another rendering engine (wikipedia style)?

Hi I'm new to XWiki and would like to know, how can I integrate another rendering engine into XWiki (especially Wikipedia rendering based on Radeox)? Is there an online guide available? Can someone point me to the main interesting classes? Is there a "synchronizing API" with another XWiki instance available? Does someone has experience in integrating XWiki into a roller blog system? -- Axel Kramer http://www.plog4u.org - Wikipedia Eclipse Plugin http://www.bliki.info