Check your PICTURES/RACE folder and see if you have all the images. Sounds like you don't have the BMP's for these races.
What Version of the mod did you download? I think there is one that is data only, and has no BMP's included.
If you do not have them, then you will need to download them from
www.newageshipyard.cjb.net or
www.galileo.spaceports.com/~william/main.htm You will want the Neo Standard Version if they are offered for the Star Trek races.
The orions are offered on the
www.astmod.com/startrek/stm.htm page
You should email the mod creator and ask him for help as well.
Also you will need to get the latest Version of the Image Mod. I think those are available from
www.spaceempires.net/home