I read fdisk(8) carefully (At least I think so), but I repeatedly failed to install two OBSDS on two primary partitions of a HDD.
The idea was to realize a multiboot by toogleing the boot-flag to the primary partition of the particular OBSD system I want to boot. However, I think that the install process always chooses the same primary OBSD partition for installation (the first that appears in the table?) and I have no control. /jo