You can reach filters/codecs through BSPlayer's "Options"/"Filters" (with a movie loaded). For DivX5.1.1 codec, please check its settings on Tab "Quality". (These can also be reached
directly through [Start] "Programs"/"DivX"/"DivX codec"/"Decoder configuration Utility".)
If "Support Generic Mpeg-4" is checked (selected) my XViD movies play using (i.a.) DivX-decoder. If this box is unchecked, same movies will use XViD's codec and XViD codec will be shown under "Options"/"Filters", where you also can set its properties (such as "flip video").