xCAT - MSN File Sender

xCAT - MSN File Sender is a useful extension that allows you to easily and quickly send files to other MSN users (via Windows Live Messenger) directly from the context menu via the Send item.

When browsing files (e.g. in Explorer), just right-click, select a specific user in the Send submenu that you have previously added to the list (not all your MSN contacts are shown here), and the file will be sent to them immediately.