It's hardly a good method, but I got the guide working by plugging in an USB tuner and confguring the guide, then repeating this on all my computers.
I know RecordingBroker should work, but it doesn't. Are there any steps I'm missing? I typed in the Host name, clicked save, exited, open the config again, and tested it (it works). I went to the computer with no tuner (but with EPG) and scheduled a few recordings. I checked on the computer with tuner in a few minutes (I chaned the poll time to 5sec so it should be there already), but it wasn't. Did I miss anything?