Hey I was just wondering where do the modules go and what config files does it change when I run this... magical program that just does it all, its fine when it works.

I just like knowing what things do and what is being changed...

For the module, look at :
/lib/modules/`uname -r`/kernel/drivers/video

For the others :
locate nvidia
(that will help, you can use it with : | grep -v <exclude word> to filter output)

There is an option you can use that will create the nvidia-installer directory and exit. The readme files inside the directory will probably answer all of your questions. After the installation, there is also documentation installed including a common question/answer section. If I remember correctly, there is a nvidia.ko module installed as well as a glx.o module.

If you boot up from one of multiple kernels, then you need to re-run the installation for each kernel. There is an option you can use so you don't need to actually boot into the other kernels to install their nvidia modules.

Thank you both very much for the information... I was just curious