Installing D-Link DWL-G650+ on Toshiba Satellite 2805-S305 notebook

1) Appended to /etc/apt/sources.lst:
deb http://stef.tvk.rwth-aachen.de/~nazgul/debian acx100/

2) Then:
$ sudo apt-get update
$ sudo apt-get install acx100-firmware

3) Then added the following line to /etc/network/interfaces:
iface wlan0 inet dhcp
wireless_mode managed
wireless_channel *N*
wireless_essid *ESSID*
wireless_key *KEY*
wireless_rate 11M
auto wlan0

Note: My wireless router is a D-Link DI-524 on a mixed-mode setting. By omitting the line wireless_rate 11M or changing it to any other number than 11M, the CardBus stays disconnected (even if it registers full bar signals). So the wireless_rate 11M line is the key to making the CardBus connect.