After hours off playing I am totally stuck. Please could anyone help with these items:

The Wave: I have the wave shaft, where do I find the rest?

Gesen Bow: Here I also have the shaft, and I can't find the rest..

Where do I find a Silver dragon?

I killed skelleton-things or at least to off them, and got the golden arm, leg and torso. What do I use for?

I'm only in chapter 3, if that important to answering my questions.

Sory about the english, I'm danish.

Thanks.

Hmmm... you're talking about some really difficult quests there... Because you're only in chapter three, you cannot get some of the items. You must first get to Spellhold to get the Wave blade and the Gesen Bow string... so I'm not going to spoil you about those, you can try to find them yourself once you go to Spellhold and after that, the Underdark. (or return to this board later if you really want to know). As far as the other items are concerned:
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SPOILERS AHEAD

If you want to make the Human Flesh armour>> reconsider! It's only of use if you plan to use it on an evil character (as it's unusable by anyone with a good alignment) and even then it's not really great armour. The Silver Dragon is located in the Underdark, but you will get there only after going to Spellhold

The Golden bodyparts are part of a quest for a lich named Kangaxx. He is incredibly powerful and as you're only in chapter three I would wait doing this quest until you've leveled up a coulple of times. Do hold on to the legs/torso, you'll need them when you're going to do this quest. Kangaxx is located in the Docks district between Maevar's Guildhall and the Sea's Bounty: be careful, the door is trapped!

Note: if you want to assemble the Wave, you HAVE to go with Saemon Haevarian after finishing Spellhold, i.e. do NOT go through Jon's Portal

PS. About the English: don't worry! I've seen lots worse on this board