Replacing the front fan on a Coolermaster Cosmos II?

[boed]

I could use your help on replacing the front fan. In this picture it shows the front grill coming off easily - the sleds still on which leads me to believe I don't have to tear the whole thing apart again. I don't want to break it but it doesn't eapar the front grill just pops off.

 

[boed]

My bad it does indeed come right off- I was trying to pull it down like and idiot. Now I need to track down a 200mm silent fan!