customised kernel

[kanhu]

Hi all,

I have installed fedora core 3 to my system using installation CD.The 
installation process is successfull and the system is running 
successfuly.The problem is that I am unable to find the kernel source 
tree in /usr/src directory. my aim is to build a customised kernel.
a> uname -r, gives me
2.6.11-1.35_FC3
I have download the kernel [linux-2.6.11.tar.bz2] from Internet and 
unpack and place it in /usr/src directory.
When I try to compile the kernel, It asks for config directory.
Where can i get my current kernel configuration or is there any 
alternative way to build a customised kernel .



With  Thanks  & Regards
Kanhu.