but I have the cd of FC3 how to install from cd? X11 and Kde
Please don't top-post on this mailing list.
If you're lucky (and you haven't installed any updates to your system), the system-config-packages tool (Add/Remove Packages on the menu) will allow you to install from CD.
If not, you'll need to work out which packages to install and then extract them from the CDs yourself manually and install them using RPM. You could use the "yum groupinstall" command I mentioned last time to find out which packages were needed, and answer "n" when it asks for confirmation to download and install the packages.
Alternatively, if you have lots of disk space free, you could set up a yum repository on your hard disk, which would save you downloading the packages from the Internet.
I described how to do this at: http://www.redhat.com/archives/fedora-list/2005-February/msg00083.html
Paul.