Software RAID - renaming device

I recently attempted to replace four disks of an array (Linux software,
RAID 0) with four larger disks. I created the larger disk array as
/dev/md1, and then copied 300 GB of data files over to that array. I then
removed the original four disks (I can't fit all eight in the box -- I
only want four new disks), and expected that /dev/md1 would now be simlpy
recognized as /dev/md0. wrong wrong wrong

In order for the new array to be recognized, it apparently must be
/dev/md1. Is there some way to update the superblock info without losing
data? I want the new array to be /dev/md0.

Thanks for any help.

Eric