You might try to see if your Vendor (Sony or the manufactur of the Wifi card I'd guess) has the Windows Drivers for download that you can unpack some where and copy over to the laptop.
a) i have this card : Intel Pro/Wireless 2200 Bg - but this card is not operative afetr installation PC-BSD_1.2 ( "no carrier")
b) i have files .sys e .inf for to use NDISGES: last step ( after re-write file .inf because is present an error .... to many rows "exceptions" ...i deleted all rows of exceptions ) not completed for an error ( "not present archive /etc..... i not remember )
c) i test command "kload ndis" but KLOAD is a "unknow command"
for installation I used ONLY CD_1
...this evening i test INSTALL only PC-BSD_1.3 whith CD 1 & 2
Copyright 2005-2010, The PC-BSD Project. PC-BSD and the PC-BSD logo are registered trademarks of iXsystems. All other content is freely available for sharing under the terms of the Creative Commons Attribution License.