A good installation tutorial for Debian ?

Can someone provide a good tutorial with video driver installation for Debian amd64 ?

I wish that because i had an issue with driver/3d acceleration after changing hdd,i’ve got 2 errors,one for kwin(but was not so important) and second from Steam someting like “OpenGL GLX context is not using direct rendering, which may cause performance problems”.

Video card is gt630,driver version was 319.32(or 319.23 not sure) and os Debian Wheezy amd64.

The steam problem can be solved with

sudo update-alternatives --config

but there should be something after config but I don’t remember it maybe this helps