[Plugin: WordPress Popular Posts] Styling-Question: No 1….5

Hi there, just a short styling-question (btw wonderful plugin!). I would like to display the top-5-posts with No1,…, No5 in front. As I´ve seen on several websites (e.g. http://blogcastor.com/extend/codex/display-buddypress-followers-counts/). It´s obviously not an ol-list but I don´t know how to manage it with wpp?

Any help is appreciated

http://ww.wp.xz.cn/extend/plugins/wordpress-popular-posts/