Function of Important F Keys on Keyboard and Windows Recovery Environment Explanation

I plan to purchase the XPS 630 computer (once the light and fan problems are fixed) with Vista Business.  I would appreciate it very much if someone could confirm/explain the function of the following keys and the windows recovery environment. 

By reading the various Dell forums, I think I may have identified some of the vsery important key functions

F2 - BIOS - System Setup program

F8 - Advanced Boot Options for Vista (which includes option for Dell Factory Image Restore

F11 - Dell Factory Image restore (for windows XP)

F12 - ???

Windows Recovery Environment - I have seen this phase used at times.  Is this the initial screen that comes up when booting from the Dell Vista OS Disk?