The only thing I am gonna say is if you are going to download any content from someone off the internet don't use mIRC for it. Try using programs like Kazaa or Morpheus or iMesh...they are built specifically for that purpose. Also, don't forget the possiblility of receiving any viruses or trojans; be sure to constantly use an anti-virus scanner so that does not happen.
<insert further lecture of using mIRC for downloading and why you shouldn't be doing so>