BS Pro 5-channel sound. How?

[rado84]

I don't know is it bug but I thought the topic's place must be here. Also, I've read the FAQs in the index page but there was no answer to my question. I don't know how, but SOMEHOW Media Player Classic can make 5.1 channel sound to play in two speakers only and I can hear all sounds in the movie. But with BS Player (Pro) I can hear the character's voices but they sound like they come from the outer space. So, HOW can I make BS Player to put the 5 channel sound in two speakers only? ANY codecs or something else? I have no idea what the hey is AC3 Filter.
And what would happen if I just copy the whole dll-files (I suppose these are the codec files?) from the media player directory to the BS directory? Is it gonna crash?