In case you do not have the initial par2 file for the Moth3r TESB fileset, I have reposted this for you.
Download this, put it in the same folder as all the rar files, run QuickPar as per Moth3r's instructions and this will highlight just how many blocks short you are to complete the fileset.
You will then need some more of the larger par2 files to do the repair..........
BTW. Moth3r. this is an excellent transfer and I am so looking forward to seeing the trilogy completed.