Greything: That was a good suggestion. I am new to Vista, and thanks to your advice, I am able to figure out certain applications beyond NWN.
Anyway, I tried the compatibility mode, and it worked. I tried the XP SP2 compatibility. However, when I begin play, everything's black, and the character cannot move. I only see Pavel (the NWN original campaign), the buttons below, the portrait along with their corresponding tabs, etc. But no movement. I only see Pavel and my character...