Ahh, true. If he is using the free version he won't have LO. Oh well. There is always the magic wand in photoshop or whatever photo editor you like. There are good free online photoeditors you can use now too.
I'm still baffled why SU on a PC won't export a transparent png file automatically. I was always under the impression that it was something that the Mac OS facilitated. But now that I know LO does it automatically, it seems like SU should too.
Chris