I installed lcpdfr and all that and now when I try to go on duty by pressing alt p it make the screen go blurry hellllp

It goes blurry when you press your P button. Just press P again and it will go back to normal:)

just press "P" again after you press "alt + P" 

No I mean alt p is not leting me go on duty

Sooo you just gave us two different stories here.

 

First you said you press alt+P To go on duty and your screen goes blurry (thats screen blur, Just hit P again). But then you say its not letting you go on duty.

 

 

If its not letting you go on duty, go to your gta directory and paste in your contents of lcpdfr log file. Could be an error or failed install. As for the screen blur just hit P again.

 

 

But seriously, Which of the problems are you getting, Screen blur or can't go on duty? Please specify.

You can also change the key in the GTA IV controls thing in the start menu. I forget what it's called, "definition" or something. Just make it a key you don't use instead of P. But if LCPDFR doesn't start, then we need more details.