Should be no problem. And you might as well get the wireless N adapter as well. I think the prices should be very close between the B/G and GBN adapters.
I installed the new wireless card but after turning it on after the installation I got the following message "1802: Unauthorized network card is plugged in - Power off and remove the miniPCI network card".
I looked into it, but I really don't know what to do now. I'm afraid of the BIOS thing, so not sure what a good solution would be at this point.