Alright, this still isn't working. I tried the following.

Firstly I started a new pz3 with the following setup

Two swords:

Sword A is the parent OF the right hand
Sword B is parented TO the right hand

I translate sword A around to pose.

When I'm done, I turn off IK as instructed. And this happens:

The right hand baloons up horribly. The swords are at 66% of their original size, which may have something to do with that.

So I tried saving the pose anyway. This is with IK OFF. Just adding it to the pose library on the right. It seems to save just fine.

Then I tried reimporting it into my main file. Just a static, single frame pose. And it came out like this.

What am I doing wrong ?