Using Sereja's Female Officer Model in SWBF2 (Addon mesh problem)

[Okwals97]

Hello everyone,
Lately I've been trying to get Sereja's female Imperial officer (from his Death Star map assets pack) to work in SWBF2. The funny little thing about that model is that the hat and hair piece are a separate addon MSH, that apparently has to be added via the ODF file. Now, since SWBF2 uses a slightly different code to apply addon meshes, I assumed that I should attach that part similarly to backpack addon meshes, only changing the bone to which this msh is attached. However, the addon part does not appear in-game and I don't know how to fix this.

I'm probably doing something wrong, so I'll share the part of my ODF file:

AnimatedAddon = "female_officer_hat"
GeometryAddon = "female_officer_hat"
AddonAttachJoint = "bone_head"

Any suggestions? And thanks in advance for any answers.

EDIT: Just to avoid doubts regarding this: I checked the name of the hat part mesh, and it's the same as in the ODF file. I also made sure not to forget to copy the hat mesh along with the body mesh, so those are definitely not the case.