We will be needing to copy some information from a Vanilla NIF in order to get our Bow to work correctly. For us to do this we'll have to import it, but since we're a little ways off getting Skyrim support for Blender we have to take an extra step. So what we need to do is pick our NIF, in this case the ebonybowskinned.NIF and edit it in NIFSkope removing any data Blender can't handle yet.
You'll need to look through the vanilla bows and find one that has roughly the same shape as your bow and use that for importing, it'll make things easier.
Let's open up our NIF and start removing data, if you're following the tutorial and using the same bow, this is what we'll need to remove.
BSBehaviorGraphExtraData
BSInvMarker
NiStringExtraData
bhkCollisionObject
BSLightingShaderProperty
With all that removed we'll be left with a NIF that looks like this:
Our last step with this before we import is to change the NIF version number so the NIFScripts can import it. Click the toolbar at the top and go to View>Block List>Show blocks in List.
Click on the NiHeader at the top and make sure you have the Block Details pane open. We need to change the following:
User Version to 11
User Version 2 to 34
Save it and we're ready for importing. Open up Blender and your Blend file with your bow in, then import the ebonybowskinned.NIF you just saved.