Not exactly sure what you mean. Are you saying that you can't find it in the techroom? If that's the case (and you've installed TBP Base 3.3 and the 3.3a patch properly), you can view all models in the game through the Lab. Back out from the techroom into the mainhall where you've got options such as "Techroom", "Pilot", "Campaign", etc. Then, press F3 and you'll be brought to a completely different screen. Select the ship viewer, then the "terran" species, then scroll down (possibly) until you reach the "Whitestar" entry. Select it, then select LOD0 and you should be treated to a view of the new and improved Higher-Poly Whitestar model, now with 3-primary support for player action. This model has been brought to you by I_E_Maverick, and to a lesser extent myself, and the good people of TBP.
