Is the file you downloaded a ISO file or is it just the folders?
You will need a free program called imgburn.
ISO: Open imgburn, select "write image file to disc", select the ISO file and burn to a DL DVD+R
Folders: Open imgburn, select "write files/ folders to disc", import the folders (BDMV etc), change the UDF to 2.50 in the "options" tab, then burn to disc.