I use the HD moudule (in BV7-40 Mk IV) together with HDR2. Which should be the same as your setup.
Using the EPG to find the show I want to record and just press Red and Go on Beo4 then it will record from the DVB-HD module.
It is an analog recording. It consumes the same amount of space as recording from analog turner.
One major drawback in my opinion is that the DVB-HD turner in the TV is locked while recording. So you can't watch an other channel while recording.
/MikaelB