Hey, I modified your OSXDock for 1920x1200. It is a bit diffrent from yours: I removed the temperature monitors and replaced them with Xosview moitors for mem, disk and network. Il also reoved the peksystray entries which I do not use.
Here it is:
DestroyModuleConfig FvwmDock: *
*FvwmDock: Geometry 1920x26+0+0
*FvwmDock: Font "Shadow=1 b bl r br r :xft:Verdona:roman:pixelsize=11:minspace=True"
*FvwmDock: Colorset 31
*FvwmDock: Rows 26
*FvwmDock: Columns 1920
*FvwmDock: BoxSize fixed
*FvwmDock: Frame 0
*FvwmDock: (76x26+20+4, Title(Side) "GentooBox", ActionOnPress, Action(Mouse 1) `Menu MenuFvwmRoot Rectangle +$left+260 0m`)
*FvwmDock: (80x26+96+4, Title(Side) "Préférences", ActionOnPress, Action(Mouse 1) `Menu MenuFvwnConfig Rectangle +$left+26 0 0m`)
*FvwmDock: (90x26+176+4, Title(Side) "Gentoo-Tools", ActionOnPress, Action(Mouse 1) `Menu MenuGentooUpdate Rectangle +$left+26 0 0m`)
*FvwmDock: (38x26+288+4, Title(Side) "CPU :")
*FvwmDock: (40x22+328+3, Frame 0, Left, Swallow(UseOld) "cpu" `Exec exec xosview -title cpu -labels -caption -mem -load -swap -page -disk -int`)
*FvwmDock: (38x26+370+4, Title(Side) "MEM :")
*FvwmDock: (40x22+410+3, Frame 0, Left, Swallow(UseOld) "mem" `Exec exec xosview -title mem -labels -caption -cpu -load -swap -page -disk -int`)
*FvwmDock: (40x26+452+4, Title(Side) "DISK :")
*FvwmDock: (40x22+494+3, Frame 0, Left, Swallow(UseOld) "disk" `Exec exec xosview -title disk -labels -caption -cpu -load -mem -page -swap -int`)
*FvwmDock: (38x26+536+4, Title(Side) "NET :")
*FvwmDock: (40x22+576+3, Frame 0, Left, Swallow(UseOld) "net" `Exec exec xosview -title net -caption -labels -cpu -load -mem -page -swap -int -disk +net`)
*FvwmDock: (185x26+868+0, Padding 2 0, Frame 0, Swallow (UseOld, NoClose) FvwmKernel `FvwmScript FvwmKernel`)
*FvwmDock: (16x26+1344+0, Icon $[fvwm_icon_path]/playlist.png, ActionOnPress, Action(Mouse 1) `Exec exec $[fvwm_scripts_dir]/xmms-start.sh`, Action(Mouse 4) `Exec exec xmms-shell -e 'window all show'`, Action(Mouse 5) `Exec exec xmms-shell -e 'window all hide'`)
*FvwmDock: (16x26+1360+0, Icon $[fvwm_icon_path]/prev.png, ActionOnPress, Action(Mouse 1) `Exec exec xmms-shell -e 'previous'`, Action(Mouse 3) `Menu XMMSControl `, Action(Mouse 4) `Exec exec xmms-shell -e 'upvolume'`, Action(Mouse 5) `Exec exec xmms-shell -e 'downvolume'`)
*FvwmDock: (16x26+1376+0, Icon $[fvwm_icon_path]/play.png, ActionOnPress, Action(Mouse 1) `Exec exec xmms-shell -e 'play'`, Action(Mouse 3) `Menu XMMSControl Rectangle +$left+26 0 0m`, Action(Mouse 4) `Exec exec xmms-shell -e 'upvolume'`, Action(Mouse 5) `Exec exec xmms-shell -e 'downvolume'`)
*FvwmDock: (16x26+1392+0, Icon $[fvwm_icon_path]/pause.png, ActionOnPress, Action(Mouse 1) `Exec exec xmms-shell -e 'pause'`, Action(Mouse 3) `Menu XMMSControl Rectangle +$left+26 0 0m`, Action(Mouse 4) `Exec exec xmms-shell -e 'upvolume'`, Action(Mouse 5) `Exec exec xmms-shell -e 'downvolume'`)
*FvwmDock: (16x26+1408+0, Icon $[fvwm_icon_path]/stop.png, ActionOnPress, Action(Mouse 1) `Exec exec xmms-shell -e 'stop'`, Action(Mouse 3) `Menu XMMSControl Rectangle +$left+26 0 0m`, Action(Mouse 4) `Exec exec xmms-shell -e 'upvolume'`, Action(Mouse 5) `Exec exec xmms-shell -e 'downvolume'`)
*FvwmDock: (16x26+1424+0, Icon $[fvwm_icon_path]/next.png, ActionOnPress, Action(Mouse 1) `Exec exec xmms-shell -e 'next'`, Action(Mouse 3) `Menu XMMSControl Rectangle +$left+26 0 0m`, Action(Mouse 4) `Exec exec xmms-shell -e 'upvolume'`, Action(Mouse 5) `Exec exec xmms-shell -e 'downvolume'`)
*FvwmDock: (160x22+1460+2, Frame 0, Swallow (UseOld, NoClose) FvwmPager)
*FvwmDock: (24x26+1634+0, Padding 1 0, Icon $[fvwm_icon_path]/find.png, ActionOnPress, Action(Mouse 1) `DockLaunch "gnome-search-tool" $left $top`)
*FvwmDock: (24x26+1658+0, Padding 1 0, Icon $[fvwm_icon_path]/eject.png, ActionOnPress, Action(Mouse 1) `DockLaunch "$[fvwm_scripts_dir]/eject.sh" $left $top`)
*FvwmDock: (24x26+1682+0, Padding 1 0, Icon $[fvwm_icon_path]/displays.png, ActionOnPress, Action(Mouse 1) `DockLaunch "$[fvwm_scripts_dir]/screenshot.sh" $left $top`)
*FvwmDock: (24x26+1706+0, Padding 1 0, Icon $[fvwm_icon_path]/v4.png, ActionOnPress, Action(Mouse 1) `DockLaunch "gamix" $left $top`)
*FvwmDock: (120x26+1736+0, Padding 2 0, Frame 0, Swallow (UseOld, NoClose) FvwmApplet-DigitalClock `FvwmScript FvwmApplet-DigitalClock 30`)
*FvwmDock: (26x26+1866+0, Padding 1 0, Icon $[fvwm_icon_path]/shutdown.png, ActionOnPress, Action(Mouse 1) Quitter)
Here is what it look like: OSXDock
Enjoy!