Well, this isn't exactly a che - The Lord of the Rings: The Fellowship of the Ring
Well, this isn't exactly a cheat, but...
Well, in Amon Hen when Sam is taken by a Nazgul, just play normally. Now, search around enough, and you should find Gollum three times (I can't remember where). Now, you know the part next to one of the campsites, with loads of Uruk Hai (those big orcs with white heads)? Well, go forwards, up to one of the hills, I can't remember exactly which...
And you should find a fallen log making a bridge to this little dip, now walk across it, and down...
You should find Gollum, muttering something about presents. He will throw a fish at you, called "Xiphiidae" this is the best weapon in the game (yes, a fish) and can kill trolls in about three hits!!!
Back with more soon, but for now, bye...