transparent models

if one wanted to make models transparent, how would one best go about it? the models i wish to make transparent are doodads/destructibles. i'm quite sure that i have to create a custom version of the model as i've found no in game method of doing so. however, i'm not sure if i need to do this with a 3d prog or if i can simply affect the skin's transparency in photoshop.
any suggestions?

Just add an Alpha tag to the material section, on a scale from 0 (transparent) to 1 (opaque). See more info here http://www.wc3campaigns.com/forums/s...threadid=22941

thanks KDEWolf for your assistance in pointing me in the right direction. it's extremely helpful in making sure that the immense amount of time i'm dedicating to learning this stuff is spent wisely.