How to have more than one window manager?

[Ivan Uemlianin <iau@ukfsn.org>]

Dear All

I'm not using a display manager, but I'd still like a choice of window 
manager when I startx.  How is this done?

My boot up takes me to the console, where I login and start up X with 
'startx'.  I prefer it like this: I have not installed [gkx]dm or the X 
Window System task package.

I have installed both Gnome and Fluxbox and I'd like to be able to run 
either.  How do I do this? 'startx' runs Gnome; 'startx fluxbox' gets 
this error message:

/usr/X11R6/bin/xterm:  bad command line option "fluxbox"

Any comments welcome