Sorry Carl001, that was my fault entirely. For some reason, I always think the fanpatch stuff is listed in the Tools section and not in the Fanpatch section. Why, I have no idea, except that it's a useful tool, along with the TQVault, TQDefiler, and TQCollector programs. You might want to have a look at installing them as well. The Vault will give you unlimited storage for all the nice loot you'll pick up along the way (the IT caravan will get full very quickly believe me), Defiler lets you do things like freeze time of day, stack more than 5 potions, etc., and the Collector is a useful way to check on MI's, Uniques, Amour Sets, etc. that you can find in the game.
IT is the original game, but with added features and an extra 4th Act which is why there's no real need to play TQ on its own.