The homer one and sonic only work in HK and few of urban terror server ...
Here is something that can help ya,
What you basicaly have to do is open the console whit "\" and put \funred (if you are in red team) or \funblue (if you are in blue team), and then after putting \funred, put what your funstuff that you prefer (in the link there are few but there are new other funstuffs but those one, are the main and will apear in almost all server)
Ex: /funblue ninja, goggles, spikeypp
PS: I changed this to a nother topic called "Funstuff" .. clearaly you didnt saw that