Hey Nickey,
Thank you very much for this answer. But I'm german and I dont understand all.
First I download now the 1.0b Manual Install and Copy&Paste all in my GTA IV-->LCPD First Response folder. But then I found this .pdf:
http://dl-03.x4b.lcpdfr.com/downloads/cache/4607/LCPDFR%20Manual%20Install%20Guide.pdf?st=IRUDcSh95GR8bLVhoW-bMg&e=1395590244&p=1000&iehack=.ipb
I did my GTA IV folder now like in the pictures in the pdf, you can look on the 3 new screenshots.
But I have the same problem, I cant start LCPD:FR with ALT+P.
What must I do now? Must I only copy&paste that I have the files&folders like "LCPDFR Install (ASI Loaders)" or "en-US" folder... so that I have only the LCPDFR and LCPD First Response folder presentet in my GTA IV folder?
Sorry for my english :D
Thanks very much for helping me! :)