Heya, I just went through this same thing more or less, here's the deal, you have to back peddle a bit, start by checking your .config file from your recent compile and make sure you have wireless networking checked, or you may have compiled it out of your kernel, but I believe it's turned on by default.
Next, DELETE ndiswrapper-0.6 directory, COMPLETELY(keep the .tar..gz file though!!) and do remove your driver, my command looks like this
<usr/src> ndiswrapper -e bcmwl5
of course your driver will be different., if your using X at all go into your network device control and DELETE any remaining links to wlan0 and ndiswrapper, etc... It will ask you to save and reboot, so do exactly that after all of this.
Log in as root for this part!!!
When you reboot unpack the ndiswrapper again
tar xvfz ndiswrapper-0.6.tar.gz
Then cd /ndiswrapper-0.6
then ndiswrapper -l To make sure you don't have anything still installed, then do a TOTALLY fresh make install, you need to do all this beause the makefile skips a few REALLY important steps if it finds files from the previous install. AFter this do the
ndiswrapper -i <your_driver>
ndiswrapper -l //to make sure it worked
iwconfig /// to make sure it worked
ndiswrapper -m ///to make it work on it's on
Then REBOOT again, not absolutely nessecary, but worked better for me this way, after reboot go back to the network devices control as root and configure, then add new and under wireless ndiswrapper should show up. If your doing this from the command prompt it's time for the rest of the instrucitons in the INSTALL file, but I have yet to do it this way.
I hope this helps you man, let me know
Joshua L. Austill