I am having some probs with this thing.  I use Kerio for my firewall and it does have an option to block referrer requests, but I disabled that option AND added driverpacks.net and thesneaky.com to the exceptions list, restarted the firewall and still get the leech warning.  I am not behind a proxy and am not aware of anything else that could be filtering the referrer request, unless firefox does this automatically or something.  Any ideas?  Maybe put the files up on usenet somewhere?