it depends on your signature. you can check it under forum-> options -> forum image
I don't see any problem in using official art but I'm not 100% sure so ask for a second opinion :P
"Here you can change the image to your group! It needs to be under 1MB and we suggest making it a transparent PNG/GIF around 200x200, but any size will be accepted." - from the page where you change the image I'm sure using Subeta items is fine! c:
Doh... lol. Sorry, that's what happens when I read the forums at 4 AM :°°°D