ICQ on secondary monitor?
If you have version 2000 or later, use UltraMon™ to move the ICQ window. You won’t be able to resize the window once it is on the secondary monitor, so position/size it as desired on the primary monitor first. For earlier versions of ICQ, the following workaround can also be used: span the ICQ window over the primary monitor and the monitor where you want it, then simply resize it to the secondary monitor. Don’t move the window after that, it will promptly snap back to the primary. This doesn’t seem to work with monitors which are to the left of the primary monitor. Alternatively, you could also use Trillian, an instant messaging client for multiple services, including ICQ. You may have to disable docking: Preferences > General > Contact List.