I got an Aopen fm56-pm pnp pci modem. Is there any way to get this to work in freebsd?

I found this: "You will need to add the modem's PnP ID to the PnP ID list in the serial driver. To enable Plug & Play support, compile a new kernel with controller pnp0 in the configuration file, then reboot the system. The kernel will print the PnP IDs of all the devices it finds. Copy the PnP ID from the modem to the table in /sys/i386/isa/sio.c, at about line 2777. Look for the string SUP1310 in the structure siopnp_ids[] to find the table. Build the kernel again, install, reboot, and your modem should be found."

I added a "controller pnp0" line to the end of my Kernel, recompiled and installed it. Next thing I am supposed to do is get the PNP ID, but I have no clue where to find this. ANy ideas?