How to lock windows

I'm looking for a way(if a way even exists) to lock the position of certain windows, in Vista. I have my messenger, winamp, and calender arranged in a particular way, on my second monitor, and whenever the programs are closed, they all, with the exception of winamp, are moved slightly, have changed size, or are on the wrong monitor. Does anybody know of a way, or utility, that will lock the position of the windows?