Avaya AP-3 upgrade to 802.11g only with upgrade kit?

Hello,

I have recently purchased a used Avaya AP-3 (=Orinoco AP-2000). At the
moment I am running it using a Lucent Silver 802.11b Card.
I am thinking about upgrading it to 802.11g. Can I use any Orinoco 802.11g
card or can I use only the official Upgrade Kit from Avaya/Proxim (PCMCIA
card and firmware upgrade)? I have already flashed the latest Firmware from
January 2004.

Thanks for any help.

Regards
Joachim