Just FYI - he was using DABDig ( http://www.spidersweb.freeserve.co.uk/dab/dabdig.htm
) to send recording requests from the DigiGuide client into the TiVo (via manrec).
He contacted me directly - and we had it working properly after a couple of mail exchanges on17th December. Basically - the issue was simply one of mapping certain channel names from DigiGuide into those used in TiVo/manrec.
(just came across this thead - as groovyclam mentioned, I usually frequent the DigiGuide forums and can be found there, or via email or via my own support forum)