batch processing of PAI textures

I would like to resize all the PAI textures down to 50% their size.I'm planning to use a batch command and imagetool to convert *all* my PAI aircrafts to standard TGA files; open them, scale by 50% and save them in protoshop again as tga. Then a batch command again to reconvert them into dxt1 format.In the process I would like to gain as much performance as possible, by converting them to dxt1, and no mips.Reading the forum, though, I found out somebody had a problem with propellers and dxt1 textures.would you bother splitting the lot into 2 categories, and use 2 batch commands, one for propellered aircrafts (which I'll convert to dxt3) and the other for jet aircrafts (which I'll convert to dxt1)?Also are propellers drawn correctly if the alphachannel is taken out from the texture (leaving them as dxt1 or dxt3, nomips no alpha)?thanksLuca