Offline Nvidia installation

i had success in disabling the x-server and then running the nvidia .run package:

on the log in screen i pressed "Ctrl"+"Alt"+"F1"
entered my details then used the command " cd Desktop" (this is where i left the binary pakge of the install file)
then, "sudo /etc/init.d/gdm stop"
then, (this is where i tried running the install) "sudo sh 1.run" (i renamed the file to "1.run- for convenience")

the installer opens and then, after some screens it says : "Error you do not appear to have libc header files installed on your system...... Please install your distribution libc development package. "
and there is a log that gives me details of the install process.

nvidia-installer log file '/var/log/nvidia-installer.log'
creation time: Mon Jun 9 16:07:49 2008

option status:
license pre-accepted : false
update : false
force update : false
expert : false
uninstall : false
driver info : false
precompiled interfaces : true
no ncurses color : false
query latest version : false
OpenGL header files : true
no questions : false
silent : false
no recursion : false
no backup : false
kernel module only : false
sanity : false
add this kernel : false
no runlevel check : false
no network : false
no ABI note : false
no RPMs : false
no kernel module : false
force SELinux : default
no X server check : false
no cc version check : false
force tls : (not specified)
X install prefix : (not specified)
X library install path : (not specified)
X module install path : (not specified)
OpenGL install prefix : (not specified)
OpenGL install libdir : (not specified)
utility install prefix : (not specified)
utility install libdir : (not specified)
doc install prefix : (not specified)
kernel name : (not specified)
kernel include path : (not specified)
kernel source path : (not specified)
kernel output path : (not specified)
kernel install path : (not specified)
proc mount point : /proc
ui : (not specified)
tmpdir : /tmp
ftp mirror : ftp://download.nvidia.com
RPM file list : (not specified)

Using: nvidia-installer ncurses user interface
-> License accepted.
-> No precompiled kernel interface was found to match your kernel; would you li
ke the installer to attempt to download a kernel interface for your kernel f
rom the NVIDIA ftp site (ftp://download.nvidia.com)? (Answer: Yes)
ERROR: Unable to connect to download.nvidia.com (unknown host)
-> No matching precompiled kernel interface was found on the NVIDIA ftp site;
this means that the installer will need to compile a kernel interface for
your kernel.
ERROR: You do not appear to have libc header files installed on your system.
Please install your distribution's libc development package.
ERROR: Installation has failed. Please see the file
'/var/log/nvidia-installer.log' for details. You may find suggestions
on fixing installation problems in the README available on the Linux
driver download page at www.nvidia.com.

Now this is where i am: i have no clue to what all that means and what to do to fix the problem! is there anyone who can help me to fix this? do i have to download the libc package? if so what is the approx.. size of it?

Thank you so much!