I know there is a checkbox in the DevTools and SpareParts application, but it seem this wasn't working for all apps (e.g. Google Reader)
The patch simply disabled the parts in the system where the framework checks if the device screen configuration is supported by the application and would have set the compatibility flag.
- Rename CompatibilityFix-v1.0-update.zip to update.zip
- Copy the update.zip to the root of your SD Card
- flash using recovery
Tested on FolioMod v1.3d
As always source is attached to port this to other devices/roms.