You can use apt-cdrom to add CD/DVD as sources to install from since you don't have a net connection I would recommend grabbing a DVD rather than trying to download individual packages. if you try for individual packages you will get stuck chasing dependencies until you go insane.
OK so you used the netinstall to get a base system installed.. we can work with that. Grab DVD1 and CD 17 add them as a source using apt-cdrom add
then install X and I would suggest XFCE or the even more lightweight LXDE desktop. I would recommend against Gnome or KDE if you system is that slow..
- do this for both the CDROM and the DVD,
aptitude install xserver-xorg lxde xdm module-assistant build-essential gdebi ndisgtk wireless-tools
m-a a-i ndiswrapper
I prefer wicd as a network manager. I think network-manager has gnome dependencies and kwifimanager has KDE dependencies. wicd does not have gnome or KDE dependencies as a requirement.
Some of Wicd's features include:
1. No Gnome dependencies (although it does require GTK), so it is easy to use in XFCE, Fluxbox, Openbox, Enlightenment, etc.
2. Ability to connect to wired and wireless networks
3. Profiles for each wireless network and wired network
4. Many encryption schemes, some of which include WEP/WPA/WPA2 (and you can add your own)
5. Remains compatible with wireless-tools
6. Tray icon showing network activity and signal strength
Download wicd from here
install it with this command
dpkg -i wicd_1.5.9_all.deb
that should give you your X sever, a lightweight desktop, everything you need to compile packages, nidswrapper, your graphics network manager, etc..
Is there a reason you want to use ndiswrapper right off the bat, rather than a native Linux driver for your wireless ?