Please note, that it is necessary to install TrackIr firmware (along with mfc42u.dll needed by TIRViews.dll) to utilize all of the above options. The easiest way to do that is to use the Install Linuxtrack-Wine support... button found on the Misc pane of the ltr_gui. That way, all the necessary components will be installed/extracted in one go.
On Linux, a dialogue asking for the target "Wine prefix" (or "bottle") pops up after you install the prerequisities - the Linuxtrack-Wine will be installed to the prefix/bottle of your choice.
On Mac OS X, the linuxtrack-wine.exe installer (located in the Linuxtrack .dmg package) must be installed manually - just run the installer in the desired "bottle".
Please be aware that linuxtrack-wine.exe must be installed into each and every wine bottle/prefix in which you require the headtracking.
If you installed Linuxtrack-Wine prior to version 0.99.11, to gain access to the new features you need to uninstall it first, reinstall TrackIR firware (to get TIRViews.dll and mfc42u.dll) and then install the new linuxtrack-wine.exe.
Controller allows you to bind a hotkeys to pause/resume and recenter the trackng. It can be minimized to the try so it doesn't clutter the desktop. When a Controller is started, window pops up and you should specify the pause key and recenter key - just press the appropriate button followed by key/keys of your choice (max 2 keys). One thing to be aware of is, that the Controller works (meaning it sees the hotkey pressed) only inside the bottle/prefix where you installed it!
TrackIR is a fake TrackIR executable, that is required by certain games in order to accept the tracking data. It also loads TIRViews library, that channels the headtracking data into following games:
FreeTrackTester, Tester (and on 64bit Wine also Tester64) allow you to troubleshoot the Linuxtrack-Wine installation. They are FreeTrack and TrackIR client applications and if they are working, the installation is OK.
Linuxtrack-Wine can also be uninstalled if necessary using the Uninstall.
The TrackIR software uses the plus/minus 500mm as a displacement limit, so to use the full displacement range, set the limits for translations accordingly (go to the Tracking Setup pane, select the appropriate profile, then press the Detailed Axes Setup button and for translations set limit to 500).