Let us know how you go now that you have some menus.
If you do still need to manually install you driver
Download nvidia driver,if you aint already,and execute following commands:
Logout ... Ctrl-Alt-F1 and switch to a tty and login
Code:
sudo /etc/init.d/gdm stop
Code:
sudo sh NVIDIA-Linux-x86_64*******1.run
Ctrl-Alt-Del for PC restart
You should`nt need to do any of that now that you can see what your doing though.
Not sure why the cable would be so problematic for you.
My own PC screeen`s only do vga so i use DVI>VGA leads but my kids all have HD Monitors/TV`s and their dvi/hdmi leads all work fine with *buntu.
Good luck either way.