In fairness, the later BV4 has the unique B&O set up technology.
However, the earlier versions of BV4 were just as some have described, and really not too far from what the OP wanted to do - a Bsys 2 and early B&O BV4 would be almost identical to a bsys 2 and a panasonic panel.
What Trip perceived as my defense of the OP ( which it wasn't really - it was more a reaction to the overly sensitive/critical response from some current dealers, which I feared would sound pompous and overbearing if it continued.....and it did,imo ) was really informed by the fact that I have pulled several BV4's apart over the years, and was retailing these in the UK at the time owners of the pre-HD versions startd to get SKY HD, then ring for the suitable cable/PUC update 🙁
I don't condone fakes being sold....but I can see what / why the OP was up to, as he owns a bsys 2 - which IS the B&O bit of an early BV4 set up.
To answer some IR questions, depending on the installation, the IR signal on the panel works from behind/below at the bottom l/h corner...the B&O supplied "service" remote ( which is....yes....a panasonic) is somtimes needed to get to the screen menu's, and works if held behind the panel - your type of wall mount may impact on this. However, and Ir repeater could be put at the rear, and not need sight of the front sensor, which is flush behind "that" frame.