[Openbox + Twinview] Make mouse stay in 1 screen unless..

[Dethredic]

I would like my mouse not to leave the screen unless I alt tab to a different window while playing games. Otherwise scrolling gets messed up when I go to the right.

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Samsung SyncMaster"
    HorizSync       30.0 - 81.0
    VertRefresh     56.0 - 60.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 8800 GTS"
    Option         "NoLogo" "True"
    Option         "RenderAccel" "True"
    Option         "TripleBuffer" "True"
    Option         "DamageEvents" "True"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "1"
    Option         "TwinViewXineramaInfoOrder" "DFP-1"
    Option         "metamodes" "DFP-0: nvidia-auto-select +0+0, DFP-1: nvidia-auto-select +1920+0"
    SubSection     "Display"
    Depth       24
    EndSubSection
EndSection

DFP-0 will be my gaming screen.

[Dethredic]

I found a solution:

gunnewiek.com/scripts/mousejail.htm