Grub killed my kernel! I think... =P
 

So, I decided to install Grub, and give it a whirl, to see if I liked it better than LILO as a boot loader...which I do, I like the configuration method and all the options it gives you -- far and away better than LILO's lame method =) The problem is this...after installing it into my boot sector, and rebooting the computer, booting the linux partition with the following commands:

root (hd0,4)
kernel /boot/kernel-2.4.18 ro root=/dev/hda5
boot

results in the kernel freezing with the following being the last few lines:

Dentry-cache hash table entries: 65536 (order:7, 524288 bytes)
Inode-cache hash table entries: 32768 (order:6, 262144 bytes)
Mount-cache hash table entries: 8192 (order:4, 65536 bytes)
((note: this is as far as it gets with normal messages...error follows))
Kernel panic: can't allocate root vfsmount
In idle state - not syncing

It then locks up, and sits there. Even re-installing LILO into the boot sector and booting from LILO now causes the same issue =( So now I'm forced to boot into Windows (which both Grub and LILO boot just fine =P) until I can figure out what happened...any ideas? Thanks!

Maybe try
kernel (hd0,4)/boot/kernel-2.4.18 ro root=/frv/hda5
You can also test it after removing 'ro'.

Do you have a separate /boot partition?