You have to work on Windows XP and you miss Windows Snap, your Windows 7 favorite keyboard shortcut Win + Arrow Keys? SuperResizedMe is there for you.
Win + Top: max width and max height (taskbar still visible);
Win + Right: right half of the screen;
Win + Bottom: centered;
Win + Left: left half of the screen;
Win + Escape: kill the running process.
If you want SuperResizedMe to be started when Windows starts, just put it in your Start Menu > Programs > Startup folder.