Hello Richard,
I'm *very* interested in this, although not for use with VDR.
What kind of things would you like to do?
Look at the 'sky' plugin that comes with VDR. It has a 'getskyepg.pl' (or similar!) file which uses VDR's SVDRP interface to update the EPG.It doesn't work (as such) for what I need to be able to do.