Gaming on Dual Monitors

I am trying to game on a dual monitor setup. I am using Debian with the 2.4 kernel. I am using nvidia's twinview option to run the dual monitors. My problem is that when I start up a game it starts up in the middle, between both monitors, this is a problem since the right monitor is to the right a foot and lower then my left monitor. I am wondering if there is a command to pass through games to make them run on just one monitor. Or if there's a way to configure X to run games and 3d apps on just on monitor. Here's my xfree86 cfg

# XF86Config-4 (XFree86 X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the XF86Config-4 manual page.
# (Type "man XF86Config-4" at the shell prompt.)
#
# This file is automatically updated on xserver-xfree86 package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xfree86
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following commands as root:
#
#   cp /etc/X11/XF86Config-4 /etc/X11/XF86Config-4.custom
#   md5sum /etc/X11/XF86Config-4 >/var/lib/xfree86/XF86Config-4.md5sum
#   dpkg-reconfigure xserver-xfree86

Section "Files"
	FontPath	"unix/:7100"			# local font server
	# if the local font server has problems, we can fall back on these
	FontPath	"/usr/lib/X11/fonts/misc"
	FontPath	"/usr/lib/X11/fonts/cyrillic"
	FontPath	"/usr/lib/X11/fonts/100dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/75dpi/:unscaled"
	FontPath	"/usr/lib/X11/fonts/Type1"
	FontPath	"/usr/lib/X11/fonts/CID"
	FontPath	"/usr/lib/X11/fonts/Speedo"
	FontPath	"/usr/lib/X11/fonts/100dpi"
	FontPath	"/usr/lib/X11/fonts/75dpi"
EndSection

Section "Module"
	Load	"bitmap"
	Load	"dbe"
	Load	"ddc"
	Load	"extmod"
	Load	"freetype"
	Load	"glx"
	Load	"int10"
	Load	"record"
	Load	"speedo"
	Load	"type1"
	Load	"vbe"
EndSection

Section "InputDevice"
	Identifier	"Generic Keyboard"
	Driver		"keyboard"
	Option		"CoreKeyboard"
	Option		"XkbRules"	"xfree86"
	Option		"XkbModel"	"pc104"
	Option		"XkbLayout"	"us"
EndSection

Section "InputDevice"
	Identifier	"Configured Mouse"
	Driver		"mouse"
	Option		"CorePointer"
	Option		"Device"		"/dev/psaux"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"true"
	Option		"ZAxisMapping"		"4 5"
EndSection
Section "InputDevice"
	Identifier	"Generic Mouse"
	Driver		"mouse"
	Option		"SendCoreEvents"	"true"
	Option		"Device"		"/dev/input/mice"
	Option		"Protocol"		"ImPS/2"
	Option		"Emulate3Buttons"	"true"
	Option		"ZAxisMapping"		"4 5"
EndSection

section "Device"
	Identifier	"6800"
        BusID           "PCI:1:0:0"
	Driver		"nvidia"

	Option 		"TwinView"
	Option		"SecondMonitorHorizSync" "28-80"
	Option		"SecondMonitorVertRefresh" "43-76"
	Option		"MetaModes" "1280x1024, 1280x1024"
	Option		"TwinViewOrientation" "RightOf"
EndSection

Section "Monitor"
	Identifier	"NU Flatpanel"
	HorizSync	31-81
	VertRefresh	56-75
	Option		"DPMS"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"6800"
	Monitor		"NU Flatpanel"
	DefaultDepth	24
	SubSection "Display"
		Depth		1
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Depth		4
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Depth		8
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Depth		15
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Depth		16
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
	EndSubSection
	SubSection "Display"
		Depth		24
		Modes		"1280x1024" "1280x960" "1152x864" "1024x768" "800x600"
	EndSubSection
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
	Screen		"Default Screen"
	InputDevice	"Generic Keyboard"
	InputDevice	"Configured Mouse"
	InputDevice	"Generic Mouse"
EndSection

Section "DRI"
	Mode	0666
EndSection

I have found that each game has its own config and I have never bothered to try and force a game to run fullscreen on one monitor but always use the run in window option and drag the window to the required location.
I guess it would be possible to set an X session on each monitor and then the game would only see the monitor that its X session was running on but then you lose that big desktop.
I think the NVidia readme tells you how to do it in one of the Appendixes at the end.