How do i fit a towel radiator to a microbore heating system?

Hi all, I have a 20 year old house with microbore plumbing. The supply and return valve is fitted to the same end of the existing standard radiator. Can I remove this and fit a standard towel radiator? Such rads seem to require the supply and return from opposite ends (?) Where can I find fitting/plumbing information? Cheers!