Also according to the tech PDF on the Broadcom HPNA adapter, it is also a V90 modem too.
I just poseted drivers for the HPNA card that include regular modem support. They are in the Gateway HPNA Modem directory on the freedrive account.
Having a modem support on the mini-pci would allow you to take the regular modem out and have room to install the hard drive and just about every mini-PCI card I have seen has had a modem built into it regardless if it was a HPNA card, ethernet network card, or vidio capture card.