I was trying to get a Linksys WMP54G card going (another thread on the forum) but had also purchased a Belkin Wireless G Plus Desktop Card (F5D7001) as a backup plan. Thanks to Posmanet, this is now working for me. Seems that 'rmmod bcm43xxx' is the trick.
Before that I tried using the "firmware cutter" (bcm43xxx-fwcutter) to extract firmware modules. Limited but no ultimate success with that approach. Used .inf and .sys files found through the ndiswrapper wiki. Specifically...
http://biginoz.free.fr/linux/bcmwl5a.inf
http://biginoz.free.fr/linux/bcmwl5.sys
Haven't tried to duplicate and automate this setup so we'll see if it sticks. Also would like to see if I can get the bitrate over 18Mb/s.
Apple Mac Powerbook Duo 230 Vintage Laptop
$60.00
Apple Mac Quadra 840av Logic Board w/ CPU P/N 820-0382-01 Vintage
$250.00
Vintage Dream Writer NTS 325 Computer Basic Language Notebook “Untested “
$30.00
Vintage Compaq 141649-004 2 Button PS/2 Gray Mouse M-S34 - FAST SHIPPING - NEW
$8.99
Datacomp DCK 84 BRAND NEW Vintage Keyboard
$39.00
Vintage Classic Apple Macintosh System Boot Install Disk Floppy/CD *Pick Version
$10.39
Vintage Apple LisaDraw Brochure, very nice condition
$40.00
Voltage Blaster (Enhanced) -5V ISA AT ATX Power for Vintage Retro PCs US Seller
$12.95
Vintage Retro AT PC Tower - Intel 486 4MB 3.5" 5.25" OPL Sound Keyboard POSTS
$199.00
$24.99