[SOLVED]Hangs during boot after updating all packages

I have Mageia 3, I updated all of my packages Monday and now the system gets to "reached target graphical interface" and hangs during boot. I found somebody had a similar problem, and somebody suggested:
But I don't know how to do that.
Please help! I need to have my Linux system working ASAP for a class.
FWIW my video card in ATI Radeon 7660G.
You can add xdriver=vesa kernel option at the grub stage of booting and it should bring you to a working desktop.
But I don't know how to do that.

Please help! I need to have my Linux system working ASAP for a class.
FWIW my video card in ATI Radeon 7660G.