As Darren has said having no ram is not an issue, but also means there is no benefit using a cachecard.

I was unaware that their were no cachecard drivers at all on the UK image. Currently no one is looking after that image and it has not been updated for a long time.

Are you in a position to setup the TiVo to use PPPonDSS for guided setup, and then we can try and install the cachecard drivers manually once the TiVo is running normally.

Peter.