Cant Install RTCW .. error at 56% !!

[(4reZ]

Hey Guys.. something really bad happens 2 X-Mas, i cant install the english Version of RTCW.. Its a burned CD with the original serial Code but when the files copied to harddisk the installations stopped at 56% with the message: "" an I/O error occurred while installing a file. This is normally caused by bad installation media or a corrupt installation file ""... What can i do? is it a bad copy (but it seems to be allright till then) or need I a crack bevor install the game (what i dont guess) THX a lot 4 help me and merry X-MAS Ps: Sorry 4 the bad english.. Antworten auch gerne in deutsch..