The most usefull information is following :
Such games are crap !
At first I think it was a good idea but now ... Never ever again ! Okay i mean I 've copy the whole install files so that I dont have to download it again (i think that is one of the important things to do if u download such files...) but I didnt know that u dont can use ur key many times becuase u have to enter ur cdkey and then u get an activation key so if u lose ur actiovation key ur cdkey is useless , so the install file is also useless...
But all in all I'm to blame for that because I shouldnt have had try to protect my game...
The thing with the FAQ is a good idea...