Windows Remove cookies from user profiles

I'm just wondering if anyone knows of an easy way for me to delete all the cookies from the 1600 old users profiles on my network. I'm guessing there stored on the actually machines hard drive so could i create a batch file to run at startup to delete these files?

The problem i see with this is that each machine would need to check for the coookies being stored under each user name which may be a bit of a long way round the problem.

Network is composed of 2 win2k servers and 500 odd machines. Is there any way the group policy could be changed so that cookies aren't saved for anyone?

Cheers for any help

Andy