This page explains how to configure your UK TiVo to make Mode 0 recordings.  The TiVoCommunity thread is here. The various modes are: Mode Resolution Used by TiVo Modes 1 352 x 576 Basic and Medium 2 480 x 576 High 4 544 x 576 Best 0 720 x 576 (not used)         Anyone tried mode 3? ;)

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Warning! This may fry your TiVo. Be sure you're confident what you're doing before starting!
You undertake this procedure at your own risk. Coffee may be hot. A plane may fall out of the sky onto your head. etc... ;)

If you haven't done so already, use the TiVoWeb Resource Editor to change the settings for one (or more) of the recording quality modes to Resolution 0.  (After each change press return to save the change and once finished click 'Update Resources'.  Don't reboot at this stage.)  I also upped the corresponding MAXBitrate to 8000000. 

Download this file. (Updated 22Sep03)

Connect to your TiVo and mount / read-write:

mount -o rw -o remount /

cd /lib/modules
cp fpga7114.o fpga7114.o.original

Make sure the file has the same size and attributes as the original. Mine reads:

-rw-r--r--   1 0        0          182112 Feb 14  2002 fpga7114.o.original

cp fpga7114.o_lj_<version> fpga7114.o

mount -o ro -o remount /

reboot

The file changes settings in the SAA7118E (ID 0x42 on the I²C bus).

These settings are changed for all resolutions:

Subaddress	Default Value	New Value	Function
0x2a	0xb1	0x90	Luminance brightness - set lower
0x2b	0x60	0x4a	Luminance contrast - set lower
0x2c	0x5d	0x49	Chrominance saturation - set lower

This setting is changed for Mode 0:

Subaddress	Default Value	New Value	Function
0x06	0xcb	0xc3	Horizontal sync start - move left