Hi,
Download the code from
here and compile and install it.
Compiling and install is easy-
1. Extract the tar.gz to a directory
2. Change to that directory
3. ./configure - I'm not sure if this file is present. If not present, simply omit this step.
4. make
5. su root - type the root password when it asks for a password
6. make install
Then add this line to your /etc/modules.conf (I'm assuming you are trying to install ndiswrapper to get your wireless device working)-
alias wlan0 ndiswrapper
After this you are on your own because the rest is device dependent (well almost).
-Sarav