ios 5.1 with xcode 4.2 for iOS development

To get Xcode 4.2 on Snow Leopard to run code on a device running 5.1 you can do this: If you have another Mac running Lion + XCode 4.3.1 you can copy the files from: "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/5.1 (9B176)" to the equivalent place on your SL Mac: probably "/Developer/Platforms/iPhoneOS.platform/DeviceSupport" and also copy 'version.plist' from the Lion machine in the iPhoneOS.platform folder to the SL machine. Re-start XCode on the SL machine and re-connect the devices and it seems happy enough. [If you don't have access to a machine with Lion+4.3.1 you can get the files out of the 4.3.1 DMG which can be downloaded from Apple here: http://adcdownload.apple.com/Developer_Tools/xcode_4.3.1_for_lion/xcode_4.3.1_for_lion.dmg then mount the DMG, Show Package Contents on the XCode icon and drill down to /Volumes/Xcode/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport to find the files mentioned above.]