I tryed diskcopy df0: to df1: and it almost finished copyingthen it gave me sector errors
That doesn't matter. A1000 Kickstartdisks aren't normally formatted disks. Copying the first half of a disk without errors and you have a new kickstartdisk.
If you don't trust, then there is on aminet grabkick and writekick which does thesame for you.
First boot with your kick and wb then use grabkick, after use writekick df0: AND writeprotect your Original kickdisk.
If you don't trust use dms to read the kickdisk and to write back.
Markus