Can I connect totem/mplayer with my multimedia library as the default player?

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http://askubuntu.com – I am a huge fan of totem and mplayer and prefer their sound to other applications. I want to setup my multimedia library in such a way that when I play any multimedia file it should be played in totem/mplayer. PS: I use Ubuntu 11.10. PPS: I would really appreciate if I could get most of the functionalities of softwares such as Banshee and Rhythmbox if not all. (HowTos)