Everything in my museum article is fan-produced, so I don't use actual photographs of the models or screen caps from episodes (copyright concerns, you know). Lots of good sites with detail photos are available:
http://www.mjtsc.pwp.blueyonder.co.uk/
http://www.cloudster.com/Sets&Vehicl...erpriseTop.htm
http://members.aol.com/IDICPage/enterprise.html
http://employees.csbsju.edu/rsorense.../index.html#c2