How to exclude older iOs devices in info.plist ?

Hi

I would like to exclude older device like 3GS and that my game will still be compatible with iOs 5.0
I wish add a gyroscope required capabilities to info.plist, this is the code to add :

Code: [Select]

<key>UIRequiredDeviceCapabilities</key>
<dict>
    <key>gyroscope</key>
    <true/>
</dict>
Where  do I put it in game folder to make it integrated into the generated game ?

Thanks