Have you dropped into a shell and tried running it from the command line?
sh NVIDIA-Linux-x86-1.0-7174-pkg1.run --check
That will do a checksum verification to make sure the download is ok, and:
should start the install from the command line. The readme.txt that is on the Nvidia driver download webpage has all the info you need about installing and configuring the drivers with X.
I installed these drivers over the weekend (for a GeForce 440Go) and it worked fine.