My advice to you would be to make your dolls you plan on glittering have some extra space so that you can crop out that watermark with iaza...you could also try downloading the GIMP; it's what I use and it's free and basically photoshop. You can animate with it without all those pesky water marks.
Ah, you used the dress I wanted to use for that contest, lol. Oh well. You beat me to it, so I'll find something else
Side note, what dollmaker do you use for most of your dolls? And where on earth did you find those firebender outfits? they're perfect!