If you HAVE to have Ndiswrapper installed from the get-go with debian here is a simple how-to... However be warned that this is only for those that ACTUALLY NEED ndiswrapper (not for those that just think it's easier)
Create a seberate partition and download the first 10 cds.(for those that speak english, at minimum, I don't know what cd's you'll need for whatever language you speak. I'm American and can muddle my way through a few languages, but that doesn't mean I dare to install with it)
Ok... once those are downloaded burn the FIRST one, (I said the first one not any others).
Okay, now partition and install Debian with the base system... (you can install whatever else you want but I would suggest ONLY the base system OR Gnome from the first cd) AND make sure that you added MANUALLY a new mountpoint I'll call it /storage
Once the base system is installed. It is time to install ndiswrapper.
Step 1-10.
1. mount /storage/(whatever your second cd's iso is called including the extension .iso) /media/cdrom0 -oloop
2. apt-cdrom -m -d=/media/cdrom add
3. umount /media/cdrom
4. aptitude update
5. Repeat Steps 1-4 for discs 3-10
6. aptitude install module-assistant wireless-tools
7. m-a prepare
8. m-a a-i ndiswrapper
9. mount each and every iso (cd) that it asks for (when it asks for it, as you did in step 1. (to do this you will need to switch back and forth from a different terminal by using the combination of alt+F2 for the second terminal and alt+F1 for the first) (you may want to look here
http://wiki.debian.org/NdisWrapper
10. Now install your drivers for ndiswrapper (whether it is on a cd or in the same partition as the isos.
11. After it is installed You will need to run the following commands.... to get aptitude able to go online
12. ifconfig
ifconfig wlan0 down
dhclient -r wlan0
iwconfig wlan0 essid "Internet"
iwconfig wlan0 mode Managed
ifconfig wlan0 up
************(Use the following command until connected)***********
dhclient wlan0
iwconfig
13. Now edit your fstab located at /etc/fstab and add the online repos, (whichever you want to use, I suggest lenny to begin with)
14. run aptitude update
15. aptitude safe-upgrade
16. Install whatever you want.
NOTE: As of this moment I do not know how to get step 12 to be ran each time you boot your computer and login, so you will have to run step 12 EVERY time you boot it up unless you don't want internet access.