The poseidon2.zip file you have requested: The Outdated Abyss / Poseidon2 - 4.48mb is not available. Perhaps try browsing all files for the game Star Trek: Bridge Commander and upload any files you want to share or are missing. This is the only information we could locate:
This mod improves the registries for the Poseidon and includes a bonus registry for 'USS Voyager - NCC-74656-A'. This certainly looks much better than the original textures.The only problem seems to be renaming the nif file as it just makes the model blank. I recommend you just copy over the textures and dont replace the .nif file.