I installed XFree86 4.3.0-2 onto an i686 box w/ 2 video cards.
I wanted to have a dual monitor display, but I didn't want the second monitor to have any input devices (no mouse or keyboard), because its just for displaying stuff.

So I created 2 ServerLayouts in my XF86Config file. Then I started 2 copies of XFree86 with:

XFree86 :0.0 -layout "Layout0" &
XFree86 :1.0 -layout "Layout1" &

I wanted 2 copies of XFree86 running for reliability (if one monitor goes down, the other still keeps working).

My first problem is that whenever I remove the keyboard and mouse input devices from the second monitor, XFree86 won't run.

My second problem is that both monitors won't display at the same time. I can have the first monitor displayed if I press Control+Alt+F7, but the second monitor won't display until I press Control+Alt+F8, which then causes the first monitor to go blank(both monitors won't display at the same time).
How can I fix this so both monitors display at the same time?

well you run a dual head system, not two seperate X servers. take a look at my XFree86 config....

http://thirtythreeandathird.net/dualhead

once you understand the ServerLayout section, you should be able to just guess the rest of the theory no problem

I would like to be able to run 2 copies of XFree86 for reliability.
I think using "LeftOf" in the XF86Config file referes to Xinerama, which I don't want to use.