At least for the BS3 the good old DVD-Controller is still available. You may want to check if this one is available for the BV7 as well and if your DVD is included.
I am facing the same problem with my Panasonic DVD Recorder, not on the PUC ist, but on DVD controller list. Furthermore, someone told me there is a way to "copy" the DVD controller to the PUC list. Not sure if this is possible.
Karsten
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BV4-50, Beosystem 3, Beolab 5, Beolab 3, BV3-32, BV1, BS9000, Beolab 4, Beolab 2000, Beo4 Cinema