New commers question

["Prasanta Sen" <psds1 vsnl net>]

Hi
I am new commer in Linux world started with RH5.0 in command mode only.
It was fine when following command given from my windows parition.

LOADLIN VMLINUZ root=/dev/hdax ro

But when upgraded with 7.0, I got some error message but not like 'kernel
panic..'
Although newer kernel was used which was supplied along with CD.
Then it was uninstalled but I have to try again not writing LILO in mbr.

seeking advice
P.Sen