Hi DarK_AlximinK,
A quick read of the datasheet shows that you can use the disable pin for PWM.
In fact if you look at some other Freescale breakout boards (Pololu - MC33926 Motor Driver Carrier) they recommend PWMing the disable pins.
" IN2 HIGH The logic input control of OUT2. PWM can be applied to this pin (typically done with both disable lines inactive).
IN1 HIGH The logic input control of OUT1. PWM can be applied to this pin (typically done with both disable lines inactive).
PWM / D2 LOW Inverted disable input: when D2 is low, OUT1 and OUT2 are set to high impedance. A D2 PWM duty cycle of 70% gives a motor duty cycle of 70%. Typically, only one of the two disable pins is used, but the default is for both disable pins to be active.
PWM / D1 HIGH Disable input: when D1 is high, OUT1 and OUT2 are set to high impedance. A D1 PWM duty cycle of 70% gives a motor duty cycle of 30%. Typically, only one of the two disable pins is used, but the default is for both disable pins to be active."
We have been using this shield in many of our classes without any problem. Perhaps for the second revision, we will remove the 74HC1G04 inverters' so customers like yourself can also control it using the IN1 and IN2 pins.
Jay
P.S constructive criticism is welcomed but no reason to call anyone an idiot.