heyas; i believe you need to flip the map vertical, not rotate 90 degrees...! anyway, you can do the trans map the same way you do the colour texture map, but in the transparency tab, you have to set the trans to 100% and check variable transparency. the thing to load the image is inside the function for the variable transparency. just set the yscale to -1 to have vue 'flip' it for you. you can do the same for bump maps in the bump channel... but you really want to use greyscale bump maps, not poser's freaky green/red encoded ones. :)