Installation sometimes need disc 2 and sometimes doesnot.Why?

[rpg]

im new to linux and fedora core 5 .
i tried installing linux roughly ten times.
and never manage to log to the graphical enviroment (desktop).
when installing fedora sometimes ask for disk2
and sometimes doesnot .
the whole installation completely different when installing fedora on preinstalled fedora.
after many installations i may get -after booting -screen asking for fedora or other system
after choosing fedora a command line appear:local host--
sometimes get -after restart- get dos-like prompt
how can i log to graphical enviroment and why installation is different from time to time?
plz help

[Jman]

When you upgrade, it may upgrade things not on CD 1. A minimal install may be touching different packages and needs a different set of CDs.

You did install X Window system? And you didn't have problems installing in graphical mode?

[rpg]

when i put cd1 in cdrom and boot from the cd-untill then not having fc 5 installed my pc- when coming to customize the setup
i choosed kde and gnome enivroment both with full packages-11 of 11 for kde and 44 of 44 for gnome if i remember-in this installation it doesnot need cd 2.
but when booting again from cd,and after searching for previous fedora installation it ask me for developping existing installation or making new one.
after choosing the second choice and customize the setup just like the first installation,in this installation it asks for cd 2 and cd 3 as well.
and i have never complete this installation

[Jman]

Set your default runlevel to 5.

That should try to start X and give some kind of error if X doesn't work.

[rpg]

I still have problem installing fedora core 5 on pc that doesnot have fedora installed ,
any way i know install fedora 5 and log in to the graphical environment .
my next problem is how to update my video card drvier...
i do this in windows by:
right click my computer,
then properities,
hardware tab,
then device manager and then update driver...
How to do that in fedora core 5???
thank you all for your help,you helped me so will.