With thanks for Martyn on the forums
Psion Teklogix, creators of the Psion NetBook Pro, Windows CE 4.2 .net based sub-notebook H/PC have recently released a new ROM image for the device.

The new image, version 400 (C095l) was built on the first of March and released recently, it is available in English, French, German and Spanish builds. It is not clear at this time what has changed in this release as no changelog has been posted. The image comes with a new boot ROM and some implementation enhancement. Users have also reported that the mouse driver has been enhanced to support a broader range of devices.

View: Psion Teklogix