mandriva 2008下面安装cisco VPN client 遇到的问题，各位大哥帮忙看看 ，谢谢

各位大哥 ，小弟在安装思科的VPN客户端，其中一步需要kernel headers，提示 如下，我是用liveCD装的，能否指点一下我怎么能获得kernel headers？我的kernel version是：2.6.24.4-desktop586-1mnb，谢谢各位大哥

安装提示：
In order to build the VPN kernel module, you must have the
kernel headers for the version of the kernel you are running.

For RedHat 6.x users these files are installed in /usr/src/linux by default
For RedHat 7.x users these files are installed in /usr/src/linux-2.4 by default
For Suse 7.3 users these files are installed in /usr/src/linux-2.4.10.SuSE by default

Directory containing linux kernel source code []

先安装kernel-source再说。

kernel-source怎么安装大哥？在哪里可以下载到？