in your install cd of photo shop theres plug in that you can copy over to your photo shop folders and it will then read maya iffs. If your photoshop is so old its not on the cd
then download the iff plug form highend.
Other then that maya ships ships with imgcvt wich gladly converts all your iffs to whatever format maya can wirte, just open your command line and use it.
Example in windows ifd you go the the root of your drive and type
for /r %i in (*.iff) do imgcvt %i %i.tga
would convert all iffs on your harddrive to tga's best do this under a folder structure so you dont have to wait for aeons ![]()