choosing window manager

[Dima Sorkin]

Hi.
1) How do I start KDE / FVWM2/ GNOME / TWM / Windowmaker ?
    ( I've choosed them during installation )

2) Is there some nice "welcome" program,
     that allows to choose a session kind ?

Dima.

 On FreeBSD 6.2 i386,
> startx    -- starts TWM

root> gdm   -- starts gnome desktop manager,
   which allows to start only GNOME
 (I was used that it allows to launch any WM,
  but in this case - only GNOME).