I had found the first part of the bow and gave it to Yoshimo.
Later,
[possible SPOILER]
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when yoshimo turned agains me into the asylum, he kept that
part. I've found the second part and killed Yoshimo, but he
hadn't the first part anymore.
Anybody knows if I could get it back and how ?

I am no expert but I would say you are screwed. Not your fault though cos this game can be evil. Best thing to do would be download Shadow Keeper and give it to 1 of your chars. I would not consider this as chheating as the game does not give you much of a choice.

Hmmm...I think when the Yoshimo thing happened to me, any critical items that he was carrying (i.e. Pommel stone for Equalizer, Gesen Bow stave, Silver blade, etc.) was transferred to someone in my party. Did you check everyone's inventory? If everyone's inventory was full, and the game tried to transfer the items to someone, you may have dropped them onto the ground and not noticed???

If he didn't have the item on him when you killed him, then you're out of luck, I'm afraid. http://www.tgeweb.com/ironworks/cgi-...iles/frown.gif

You don't really even need SK. Just enable the DEBUG codes and spawn the Gesen bow stave with the appropriate cheat code. Not sure what it is without looking though. If you're interested, check out Dan Simpson's BG2 walkthrough at http://www.gamefaqs.com. http://www.tgeweb.com/ironworks/cgi-...es/biggrin.gif

I can't remind if all the inventories were full
when he betraid me (I don't think so but I'm not
sure). When I killed him, he didn't have it and,
I've check all my inventories, I don't have it.