Just d/l a torrent. If you're using a public tracker, a quick check of the comments section will let you know if there are any issues with it. Contray to the comments above, the likelyhood of it having a trojan are slim to none where torrents are involved.
If you're actually worried about uploading, simply tell your client not to upload.
If you're actually worried about uploading, simply tell your client not to upload.