Problem is, that stupid Grievous clone or Necrosis as it was called, was added during late CU or early NGE, so it's not present in SWGEmu, so yeah, sorry.
its just a mod and i just tested and it didn't crashed
^ Do you think in the future there will be a way to convert the items to actually spawn characters like this in SWGemu? I don't see why it couldn't.
Yes, servers will be able to implant actual new items with ease, otherwise, the only thing you can do is replace existing models, client side (so only you or anyone with the mod sees it).
Yep, the server pretty much tells the client what to load. If a private server wanted to add Smart Cars as a Master Artisan vehicle, they'd have to add it to the server correctly, linking to the correct model, etc, and then release a patch with the models and the correct table files (teratosis this this on his own server, he can explain it the best) to make it appear for everyone in game.
Once the necessary files are added as a patch to the emu client, adding new stuff on the servers end is pretty straight forward for most things like items or creatures. Adding things like new vehicles gets a tad more complicated but there is plenty of things already in the server side code to work from.