Animating Weapons for Counter-Strike Source/Navigating in the 3D world of XSI

To navigate in XSI, hover the mouse over a view and use a shortcut key to navigate. Here are the shortcut keys:
 * s - Multi-purpose navigational tool
 * Hold left click and drag to translate/pan the view.
 * Hold right click and drag to rotate the view.
 * Hold middle click and drag to zoom the view.
 * o - Rotate tool
 * Hold left click and drag to rotate the view.
 * Hold right click and drag to rotate the view along the current vertical axis.
 * Hold middle click and drag to zoom the view along the current horizontal axis.
 * p - Zoom tool
 * Hold any mouse button and drag to zoom in and out.