Replace Mini-PCI Wireless card in HP Ze5375

I'd like to get WPA to work on a HP Ze5375 notebook running XP-Home.
It has an internal wireless LAN-Express IEEE 802.11 PCI Adapter which
does not support WPA and according to:
http://forums1.itrc.hp.com/service/f...hreadId=955845
HP isn't likely to provide upgrade firmware for WPA support on this
device. I've tried to update the firmware and drivers via the various
PRISM II upgrades (Fujitsu, etc.) and have failed.

What I'd like to do is replace the Lan-Express with a Broadcom card
that HP used in later runs of the Ze5375 or better yet the G version
of the Broadcom card, HP Broadcom 54g Mini PCI, to take advantage of
the G speeds of my WRT54G. Or a newer version of the Intel Mini-PCI
that has WPA and G support. Anyone know if any of these options will
work in the Ze5375? Another option?

Bottom line: I would really like to have WPA support and 801.11g would
be icing on the cake.

--Ben