installation

-open with openIV or sparkIV
-select gta IV {EFLC doesn't Work :( }
-go to pc\audio\sfx then open speech.rpf
-make sure edit mode enable and don't forget backup the files{ if your forget,you can download restore ped voice in the link description :) }
-replace NIKO's voice with folder where your download first,then rebuild
-done!

some speechs are still original!