Looking for a Linux script(er)

I’m looking for someone who is able to create a simple script

it must be able to download nzb files from a rss feed like feeds from tvnzb.com (or from other sites around)

with options like: download files start with harpers+island with x264 in the filename or 720p etc.. so that in this situation something like Harpers.Island.S01E07.720p.HDTV.X264-DIMENSION would be downloaded. In this situation nzbfiles matching certain criteria will be auto-downloaded and put in a folder.
I used TV NZB Reader already but that one is for Windows and I want to use it on the Conceptronic CH3SNAS device

So if anyone likes this … Please help me! ;-)