Here's a nice server-side mod that supplies servers with a new CVar for setting how long a killcam should last.
BFD KillCam Time Limit
Wish the killcam was a little bit shorter or a little longer, now you can enter the amoount of time (in seconds) that the killcam will play.
-Just place the file into your main folder (or into a folder in cod2 directory; example: c:\call of duty 2\mymod) and add set bfd_kctime "4" into your server config file.You can put any number in, that is the amount of seconds that the killcam will play. ) or leaving the quotes empty (set bfd_kctime "") wil shut the killcam off. You must turn on the killcam for this to work (set scr_killcam "1"). Enjoy!!!!