Thanks for this, but I seem to be no further forward.

I flashed Main FS and Cusrpack as you suggested using Far Manager with JD Flasher plugin, following the instructions in the "Flash K800 CID53 with K810 software CID53 (for begginers)" thread, but I still get the confirguration error message.

The phone was originally locked to 3 in the UK and I need to use it in Cyprus with the Cyta network which uses Vodafone.

What else should/could I be checking (other than my sanity)?