You guys wanna use your compression software, and try and create the file. The software will tell you how many MISSING BLOCKS you need. Then you download the PAR2 files, to fix them. The PAR 2 files take the place of 'ANY' missing parts. This way you dont have to ask people to upload certain missing parts, and anyone missing ANY part can use the PAR2 files.
I'm using EasyNews via the web interface, and i;m showing their are 22 PAR 2 files, which should equal approx 140 blocks.
Win