were there any compaq cd's bundled with your server? if so, you want the one labled "smart start"... that cd has a gui called the compaq array configuration utility for setting up arrays with your adapter. but you don't need the cd or the gui to create or manage your arrays. watch the console during post, once the array controller starts up it will display a message with a certain key combination you can press to configure the adapter (and it's arrays)... I don't remember the key combination off hand, but it should be easy enough to find out.
hope this helps!