sry. road runner is based on winamp commands and the layout winamp has. you can embed WMP if you want to, ive seen threads on that.
personally, it is worth converting to winamp
1) more plugins => better sounding music
2) its already functional with RR
3) ratings work with RR and winamp, if thats what you need.
4) winamp and RR plugins provide better layouts/search capabilities/arranging features than ive ever seen in WMP. i use RR or winamp on all my computers and have abandoned WMP altogether.
5) im sure there are more reasons...