Here's my stock response:
IRC (Internet Relay Chat) is a chat medium, not a file-trading network. While some folks have kludged the simple DCC file transfer features into vast (and non-standard, and very possibly illegal) file trading enterprises, all questions about them should be directed to their operators.
Their inability to be easily contacted speaks volumes, and we are not a substitute for them. For a very comprehensive tutorial on IRC and downloading files, visit
http://www.irchelp.org/downloadThis has nothing to do with mIRC. All we can tell you is that you are more likely to get a computer virus or trojan than anything useful. For further information, contact your ISP (Internet Service Provider).