Help installing wireless card - Ubuntu 8.4

I am runnig Ubuntu 8.4 in a "BenQ Joybook S41" laptop.
The laptop comes with an internal wireless card installed (Pro/Wireless 4965 AGN). IMPORTANT: This card is currently being detected as "wlan0".
I purchased a USB external card (alfa awus036h). This card is plug and play and it is supported by Linux. I connectd the card to the USB port and ran iwconfig, but I can only see the excisting internal card (Pro/Wireless 4965 AGN). I tried turning the card off (through a switch in my laptop), but that did not work either.

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chakib@Ubuntu007:~$ iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wmaster0 no wireless extensions.

wlan0 IEEE 802.11g ESSID:"" Nickname:""
          Mode:Managed Frequency:2.437 GHz Access Point: 00:1C:DF:08:57:5D
          Bit Rate=54 Mb/s Tx-Power=27 dBm
          Retry min limit:7 RTS thr:off Fragment thr=2346 B
          Power Management:off
          Link Quality=96/100 Signal level=-31 dBm Noise level=-127 dBm
          Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
          Tx excessive retries:0 Invalid misc:0 Missed beacon:0

chakib@Ubuntu007:~$
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I found online instructions on how to manually install the card (http://www.aircrack-ng.org/doku.php?id=r8187). So I decided to try that route...I followed the below instructions, but the last step (make install) did not work.

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wget http://dl.aircrack-ng.org/drivers/rtl8187_linux_26.1010.zip
unzip rtl8187_linux_26.1010.zip
cd rtl8187_linux_26.1010.0622.2006/
wget http://patches.aircrack-ng.org/rtl8187_2.6.24v3.patch
tar xzf drv.tar.gz
tar xzf stack.tar.gz
patch -Np1 -i rtl8187_2.6.24v3.patch
make
make install ****THIS STEP DID NOT WORK*******
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Everything goes well until this point.. When I type "make install", I get the below error:

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chakib@Ubuntu007:~/rtl8187_linux_26.1010.0622.2006$ make install
install -d /lib/modules/2.6.24-16-generic/kernel/drivers/net/wireless/rtl_ieee80211
install: cannot change permissions of `/lib/modules/2.6.24-16-generic/kernel/drivers/net/wireless/rtl_ieee80211': No such file or directory
make: *** [install] Error 1
chakib@Ubuntu007:~/rtl8187_linux_26.1010.0622.2006$
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What can I do to install this card?