Force Re-Check on Individual Files

[RyGuy]

Antivirus being what it is quite often removes executable files from downloads after they've been completed. I came across this problem today whereby I had to re-check a torrent over 20GB in size in order to re-download a single 3MB executable which as you can imagine took some time. Is there any way a re-check for individual files would be possible to implement? I understand the torrent structure is split into 'pieces' rather than the files themselves, but aren't those pieces identifiable in order to request their download again?

Thanks in advance,

Ryan