Your assumption regarding device and function seems correct to me, since 0x37CA is the same for every command.

I cannot help you any further. As I wrote earlier, you can build an IR sender and receiver. The recipe are made by the same guy that wrote IrScrutinizer, and can be used with it. You can find it here: [Link: harctoolbox.org]
He is the user who helped me here and goes under the remotecentral alias "Barf".
You could also try and ask him directly. He probably can tell if the codes you got from Lyngdorf are valid or not.

If you are living in Denmark, I would be happy to send you the one I made. You could just return it when finished. I actually have two, and I would also gladly sell you the spare.