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.
CORSAIR Vengeance LPX 32GB 2x16GB DDR4-2666 PC4-21300 288Pin 2666Mhz Memory Ram
$99.99
A-Tech 8GB DDR3 1600 PC3-12800 Laptop SODIMM 204-Pin Memory RAM PC3L DDR3L 1x 8G
$13.99
Crucial DDR3L 16GB 1600 2x 8GB PC3-12800 Laptop SODIMM Memory RAM PC3 16G DDR3
$21.50
HyperX FURY DDR3 8GB 16GB 32GB 1600 MHz PC3-12800 Desktop RAM Memory DIMM 240pin
$12.90
Crucial 16GB (2x 8GB) Kit DDR3L 1600MHz PC3-12800 UDIMM Desktop 240-Pin CL11 RAM
$23.33
Lot of 2 32GB DDR4 2666 PC4-21300 SODIMM RAM Modules Mixed Brand
$60.00
8GB PC3L-12800S 1600MHz SODIMM DDR3 RAM | Grade A
$12.00
Samsung 128GB (4x 32GB) M86B4G70DM0-CMA3 PC3-14900L 4Rx4 DDR3 ECC Reg Server Mem
$39.99
Lot of 50 4GB DDR3 PC3 Sticks Desktop Ram - mixed speeds and brands
$88.00
HyperX FURY DDR4 16GB 3200 MHz PC4-25600 Desktop RAM Memory DIMM 288pin 2x 16GB
$127.20