[Magister]

you can also gain a lot of speed by changing the two instances of

delay2(5);

in LcdCommandWrite() and LcdDataWrite() with something like

delayMicroseconds2(43);

because if you display 16x2 so 32 characters on the screen, you are losing about 160ms every refresh, for nothing, as displaying 32 characters needs less than 1.5ms.