We've had a few people ask for something like this, so here it is. Hope it helps.

Click here to read the tutorial (http://www.mnpp.net/?p=219).

Damn PSP7! No matter what I do, importing maps with backgrounds just doesn't work D: The tutorials on Wormingeneers didn't really help.

Yeah I really couldn't say what's up with that. I have only ever used Photoshop CS5 for alpha layers and stuff... and I really didn't like the results, so I don't even bother with 32-bit TGAs anymore.