In the suface material editor you will see that there are three settings for the eybrows. The first set, near the top of the list, do not apply any transparency settings to those. On the other settings for the eyebrows (upper eyebrows and eybrows near the bottom of the list) apply the t-maps, texture maps, and set the dial to max. Make sure that all parts that you are applying a transparency map to has the highlight color of black (0,0,0). The lashes need no maps except for the transparency map and of course you set that to max and make the object color and highlight color black