modding miniroot, kernel panic??

hey guys..

im modding linuxrc in miniroot.gz with a trivial change (wording in an
echo statement) and getting a kernel panic "panic: VFS: Unable to
mount root fs on unknown-block(9,0)".


my commands:
cd Unextracted-Iso/boot
gunzip miniroot.gz
sync
mount miniroot /mnt/loop -o loop -t ext2
nano /mnt/loop/linuxrc (make small verbage change)
chmod a+x /mnt/loop/linuxrc
sync
umout /mnt/loop
gzip miniroot
..then i use make-iso to make my iso image as normal.

building my CD with the unmodded miniroot works just fine!

any ideas??

thanks!..

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