Looks like NZBIndex is a mess... anyway to tell how big the target file is before adding to client?
the size is on the right hand side, the trick is finding the correct nzb needed.
For example for tonights family guy episode:
search nzbindex.nl for family guy
the first result is -[FULL]-[#a.b.teevee@EFNet]-[ Family.Guy.S10E03.HDTV.XviD-LOL ]-[1/1] - "Family.Guy.S10E03.HDTV.XviD-LOL.nzb" yEnc
then search for 76685 family guy
you end up with 2 results and obviously the first one is too small so it is the second one that you want
you have to get used to the sizes in order to weed out the spam, viruses etc.
350mb for a 40 min episode in sd
175mb for a 20 min episode in sd