I couldn't find anything about this game, so here goes :

-Can we change the fov ?

Can we change the viewmodel fov, and if not does it scale with the fov ?

-Are there any mouse smoothing options ?

You can't change fov, but the current one is okay enough.
You can change smoothness of the mouse and acceleration.

You can change the fov, actually!

in firestarter/base, find a file called env_vars.cfg. There's a variable near the bottom called "reg w_cam_fov FLOAT" which should be set to something like 100. I found setting it to 200 to be fine for widescreen.

Great! I'll add it to my other thread. :)

Thanks !

If the game natively uses a 4:3 resolution with a 100 FOV, then when set up to use a widescreen resolution shouldn't the FOV be 110 for 16:10 and 115 for 16:9 ?

Edit: I was basing my values on this FOV calculator, but don't know if it is only applicable for source engine or for FOV in general. http://www.wsgf.org/HUD_Editor

I guess it's a matter of taste. I usually run 100 in 1920x1080.