I think you got it wrong.
Freetrack is used for translating head ("equipped" with (IR) light sources) movements into head (view) movements in games.
'Mouse' and 'keyboard' options in FT means that upper mentioned head movement would transliterate to mouse movements or keyboard's keys strokes (helps handicapped persons).
Also, every game should have 'view movements' already enabled through mouse and/or keyboard. Zoom in mouse is usually through wheel. Numpad part of kyb is used for head movement too. You can also try Page Up and Page Down keys. For zoom it might be NUM + and NUM - (HOME and END). It's up to game and if you look in options of game, I'm sure you'll find it.
Also, PPJoy might help you. I'm not familiar with setting it up, sorry.
If I misunderstood you - sorry