No problem.
Go to the linked wiki page above, scroll to the bottom, download the file from FS Mods.
Unzip into its own folder in your main FreeSpace folder - NOT into Data or any other folder, just FreeSpace/Bretonia.
Within Bretonia create a Data folder.
Within Data create 3 more folders - Models, Maps, Tables.
Your file structure should now look like this:
Freespace
->Bretonia
--->Data
----->Maps (place textures here, .pcx, tga etc)
----->Models (all .pof files)
----->Tables (the .tbm file goes here)
Open the FreeSpace open launcher called, handily enough, Launcher.
Click the FEATURES button.
In the command line space type this EXACTLY:
-mod Bretonia
Done.
You should also have the Media VPs already installed.
These are also basically a mod, but Always go last on the command line, I. E. :
-mod Bretonia,MediaVp etc
NOTE no space between Bretonia's comma and the M of Media...
Enjoy.
I'll include the Bretonia in future uploads.
BH