A Serbian Film music question...?

Beware!!! Not for the faint of heart or those under 17!!!!

In the trailer for "A Serbian Film", does anyone know the song that
starts :30 to :45 in? I only ask bc I can't find a soundtrack for it,
and I'm not even sure it's the same song. The song that starts @ :30
may be spliced w/the one @ :45...but I'm unsure. Just really liked it;
wanted to see if I could download it from Itunes. Here's the link to
the trailer: http://www.youtube.com/watch?v=L_SIDOVFBTQ