tonygts, to do a manual hash check, either right click your torrent file, and then go to "Manual Hash Check" OR, you could set BitComet to make a Manual Hash Check after every download finishes by doing this
Open BitComet > tools > options... > advanced > bittorrent.hash_check.on... > value: (change to) true.
The words in brackets are instructions, not the name of the place you're trying to get to.