How can I modify initrd booting from a live cd?

I've moved the system to a vfs but it does not boot because of "FATAL: module linear not found". I guess vfs is not included in initrd.
I can boot the system from system rescue with the option "boot an installed system" wich I assume uses the kernel and initrd in system rescue and then mount / from the HD and boot the system.
Then I edited /etc/sysconfig/kernel and added linear and lvm2 and I run mkinitrd but it display some warnings (o errors) module linear not found, module lvm2 not found.......

I think the problem I I'm booting with a 3.4.66 kernel but the kernel on HD is 3.11 and mkinitrd is searchin for the modules in /lib/modules/3.4.66

How can I change it?


regards