1 - 2. No, most euro add and gunadd ways are completely patched.
3. Yes ofcourse, with OPK, but remember if you go out of the map there's a chance that you will die by falling down for a while.
4. You can see some players on the radar legit with binoculairs, but the UAV hack is patched.
5. Freeze a party? If you mean a game, yes I have seen zZzeta / S, Ccman32 and freddy11 do that, it actually says ' game halted by a referee'.
You will need alot of experience to make those hacks though, like zZzeta/S, Ccman32 and freddy11, Jabberwo0ck, killamachine, meawwww and HOOAH07.
P.s your english is pretty good for someone from France as I can barely communicate there with english.