Hey Santi, thank you for your time!
Only one question regarding them:
If the kit is for example, like, dark blue, will the white circle in the center remain white, or it will change to dark blue?
It should change to whatever the background color is (ex. black in the team selection screen), BUT that's just a detail, no big deal!
PS. I don't have my PS3 here with me, so I don't have any means to test it!