Yep, they aren't that easy. That's why most car models don't have the interior modeled. (Or have a really generic looking one.) But if it's done right, it's well worth it. Also are you going to rework the mesh so the doors open? Sometimes a portion of interior work isn't normally visible unless a door is opened. And having working doors makes a model more functional in an animation. (You can have characters getting in and out, etc.) It's looking great so far. Keep at it!

---

Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.