djspl as long as you have an original cd and serial there IS about nothing you can do wrong here
Anyways, what the guys above said is true, but I'll try to explain it a bit more. The 1.02 nocd that you've been using had not only the cd checks disabled, but also the code that checks if the key is valid. (TippeX probably has a more detailed explanation but my head hurts already from it being way too early). Anyways, what this means is that like with battlefield1942, if you use a crack, you can only connect to 'cracked' servers who don't check the serial. That's probably not what you want, so you either have to use the original without a crack, or wait for a better crack, or use Alcohol120% to run from a hard disk image. I'd advise the last one as it allows you to play without cd the cd without any need for a crack. You could ofcourse play on cracked servers, but there are usually a whole lot less of those than official ones...