Hi,I got a problem... I wrote right product key when I installed gta iv and tried to run it.
It says it is not vaild.
I cracked the game too.
Anyone got solution? If u got new product key,plz pm me thru forum 
( sry if I broke a forum rule maybe :trust:
)
no you didn't broke a rule
product keys cost

so we can't handle you them just like that ( or somebody can )
there is a bypass or called offline activation you ahd to get it with crack provider
you have an offline activation.exe and paul.dll inside it
then do this
1) Close your internet connection.
2) Copy paul.dll from “Crack†directory into “OfflineActivation†folder in the game directory.
3) Run OfflineActivation.exe in the “OfflineActivation†folder in the game directory.
Unlock code: *WILL GIVE YOU IN PM*
Serial: *WILL GIVE YOU IN PM*
and click “Activate†(with this cracked paul.dll you can enter whatever you like in the Unlock code/Serial field).
you should get the Activation Success message.
4) LaunchGTAIV.exe file has a a release date check, so:
change the date in you computer to anything later than 3rd December.
5) Run LaunchGTAIV.exe.
if you don't have i will provide you in Inbox as i'm aware i can't speak illegal here
