I suggest downloading all things related to what your end thought is. Then use it when you are sure there wont be problems as banning/brick etc.
Lots of people are horny for their so called CL (dont even know wtf it is lol) and they pop in everything they find and end up with a bricked console and wonder why...
Always, always, ALWAYS download CFW or whatever from the actual source. If geohot.com has it and megaupload too then dont be stupid to choose megaupload.