ohhhhhhh. To be honest, the Whitehall isn't in exactly the easiest ship to add.
Let's say you want to use the Whitehall with the mediavps. Here's what you do (assuming you're using
this download):
1. put everything with a .pcx extension into freespace2\mediavps\data\maps\ (create this folder if you don't have it.)
2. put everything with a .pof extension into freespace2\mediavps\data\models\ (create this folder if you don't have it.)
3. create a new text file in freespace2\mediavps\data\tables\ (create this folder if you don't have it) and call it whitehall-shp.txt.
4. put this in whitehall-shp.txt :
#Ship Classes
#End
5. copy the contents of TBL.txt into whitehall-shp.txt so that the contents of TBL.txt are between the #Ship Classes line and the #End line.
6. Rename the file to whitehall-shp.tbm.
That should do it.