Virus scan MSN 6.0

Hi I’m new to Avast…and like what I see.
Do you have to use the tools options and messages on File transfer in MSN 6.0 and direct it through the browse button for scanning file transfers? What I’m trying to say is do you check the box saying:
scan for viruses using…

If so where do you direct it with the browse button? How do you know it is scanning file transfers? Does it do it automatically?

This post is duplicate. See http://www.avast.com/forum/index.php?board=2;action=display;threadid=1027;start=0#lastPost

Please avoid duplicate posts.