OK, so like 1 month ago i copied the game Titan quest from my friends computer (it was downloaded and cracked) and i just put it in a folder and i could play (with the crash bug though but that wasnt my fault ;D) and then i removed it bcz the crash bug (i couldnt play) and now i took it again, from another friend.... and well it doesnt work. it says i have an invalid CD-key and i dont know how to change the cd-key i use since its already installed :/ i tried to patch it to 1.08 and it says i dont have titan quest installed and i tryed downloading a crack, but still doesnt work....
So if any1 know how to change the cd-key i use, please help ;D