Why disable a safety feature?
The HTC Car App introduced those blocking 'features' for an obvious reason: to discourage people from fumbling around with their phones while driving.
That's a good and important cause, but unfortunately it's not a very smart method of doing it - which is why this module was created. Consider the following scenario: You're in your default navigation app with the music player (which is controllable by the car app) running in the background. You want to skip the currently playing track. If everything's at stock, the new restrictions make it an annoyingly long process: You have to click the home button, enter the music control applet, skip the track as you normally would, then click the home button again, find the navigation app's icon and re-launch it. Without those restrictions all you do is pull down the statusbar, click the 'skip' button on the music player's active notification tile, and pull it back up.
HTC's restrictions - which are supposed to increase safety and attention while driving actually make it longer and more attention-consuming to perform such tasks.
This module allows you to overcome those restrictions, mostly, but I must still say - and I can not overstate this enough:
DON'T OPERATE YOUR DEVICE BEYOND THE BASICS WHILE DRIVING !
Play music, navigate, make and take calls - but do so safely without fumbling around.
If anything doesn't work with less then three touches of the screen, or if it requires you to look at your device for more than a split-second glance - either forget about it or pull over! It's not worth it!