Limit Attachment Downloads, like this mod for vbulletin for example

[qtime]

http://www.vbulletin.org:80/forum/showthread.php?t=152701

this function is very important for us, I hope we can still using smf, because I like the script and I know how it works, but this option is very important to run for 2 of our forums, so I hope it's possible for smf!