No, I gave you two different ways to install the driver, the first one uses the nvidia-blablabla.run you've downloaded from nvidia's website, that's the first method (quick and ugly).
The second one uses a tool named "module-assitant" (m-a), it goes with the nvidia driver available with apt-get (synaptic if you use this software as a graphic interface). This two methods are different, and must not be used together !! I would recommend going with the second one (module-assistant), particularly on an etch install.
Don't worry about "make" and such if you go with "module-assistant", just install it with
apt-get install module-assistant
as root and then run the commands i gave you ("m-a" is short for "module-assistant" on the command line, "a-i" option means "auto-install", the process will take care of the dependencies you need, just be sure you have non-free repository in your /etc/apt/sources.list file.
If you want to use the first method with the nvidia's website installer you must install make, gcc and linux-source-2.6.18-6-amd64 with apt-get before doing the "sh NVIDIA-blablabla.run" thing.
So choose one method, don't mix both.
Good luck, may the apt-get force be with you !