As of now the ISD needs to be HP'd, but it will be released as there's no problem with the damaging. As for the Executor, that seems to have been a bit of a failed experiment. The vox nif is like 53 KB, making it quite unwieldy. If I could figure out a way to reduce that I'd love to port it. As for the other ships, I'd love to build them, but I'm convinced there's a gremlin in the nif exporter for Max 2010. If anyone knows of a way I could legally obtain Max 9 I'd love to hear it. I could probably use the student version since I don't make money from modding BC. 
In the meantime I'm learning how to port the Excelsiors so those are the priorities.
Oh, can someone tell me how to export a .obj to a .nif in NifSkope?