@adicoto
As described in the mentioned site, all you have to do is to copy the "divxdec.ax" file in the filters folder, and then create a "bspfilters.dat" file, in the bsplayer's main folder, containing this two lines:
Code:
[BSPlayer filter def file]
AddFilter divxdec.ax,{78766964-0000-0010-8000-00AA00389B71},DivX 5.02
For additional informations take a look at the "bsfilters.sam" file which is present in your bsplayer's main folder!