Omg. I love your Hetalia presets. Like no joke X3 I've made my fair share. (America, England, Canada, Prussia, Hungary, 2PAmerica, and Italy) But I love ur Prussia one the most X3 So awesome. Along with all the other presets.
Nikki, it would go under my_presets. If the preset you downloaded had a specific number it would go under preset_#.Then go ingame and go into tools, preset maker, click the specific number you chose, and then export. Hope it helps.