Can not go back to graphic mode

I realy need some serious help. I am a beginer and i have a problem. i was trying to instal Nvidia drivers from NVIDIA page (I have NVIDIA Quadro FX 370). When I was tryind to do so, there was an error about x server. On some page I have read that i shoul change file /etc/inittabe some valure from 5 to 3. After I reebot my computer there was only a terminal. I could not install the Nvidia drivers because there is an error about lack of gcc or something.
But what is the real problem is that I can’t go back to graphic mode. Command sudo init 5 do not work. Please help me! How to change back /etc/inittab file?

Pause the boot by moving the down arrow, then back up to the default boot. But now press backspace, it should delete any text where you can see VGA.
Remove all text and now type just the number:
3
and hit enter

at the login type your user name and then password
now type:
su
then the root password

now type this:

sax2 -r -m 0=vesa

(N.B. the 0 is a zero not a letter)

now reboot
if you don’t get a gui login
login as user and try this at the cli

startx

===========
This should get you back a UI
Then install
gcc, kernel-source
then install video drivers

Thank you for your help, but I manage to do it my self. I have started openSUSE in savemode (Filesave), and than the comand init 5 work fine. Than I put changes in inittab and uninstal NVIDIA drivers and now everything works fine.