This is the new build, the first version had a pretty serious bug (I wasn't always calling CallNextHookEx!) so it was crashing Plus, and the plugin. Fixed a few other bugs, mainly todo with the resizing. I've added some commands to enable and disable the plugin (/xdocker_on & /xdocker_off). I'll try and get the auto-hide feature in soon.
Here's a screenshot of what the plugin does (resizes windows to the docked position). Kinda hard to explain, run it and you'll see.
You need to make sure you've set MSN Plus! to enable docking, and then you need to dock msn manually by dragging it to the side of the screen.
Screenshot:
http://tomp.arsware.org/docker/screenshot.png
Download:
http://tomp.arsware.org/docker/docker.zip (19kb)
Source :
http://tomp.arsware.org/docker/docker_source.zip (60kb)