Ramdisk with kernel 2.4.18

[VAN DUC UY]

Hello all, 
i'm new to linux-kernel so i have some questions for linux kernel .

Now adays, i try to make a Linux kernel support Ramdisk. i read some 
documents on internet and follow these document to complete. but the kernel 
cannot run properly. 

this is my linuxrc file :
*******************************************************************
#!/bin/nash

echo "Loading jbd module"
insmod /lib/jbd.o 
echo "Loading ext3 module"
insmod /lib/ext3.o 
mount -t proc /proc /proc
echo Mounting /proc filesystem
echo Creating root device
mkrootdev /dev/root
echo 0x0100 > /proc/sys/kernel/real-root-dev
umount /proc
echo Mounting root filesystem
<-------------------------------	ERROR during mount rootfs
mount --ro -t ext2 /dev/root /sysroot
pivot_root /sysroot /sysroot/initrd
*********************************************************************
and my /etc/lilo.conf
******************************************
image=/boot/vmlinux-2.4.18
	label="linux-ramdisk"
	initrd=/boot/initrd-2.4.18.img
	read-only
	root=/dev/ram
	append="init=/linuxrc"
	
******************************************	
Does somebody do it before ?
can anyone give me some guide to make a linux kernel which root filesystem is 
on ramdisk?

Thanks in advances
DUC UY