# mkdir /tmp/rip1 /tmp/rip2 # mount -o loop RIPLinuX-13.7.iso /tmp/rip1 # cp -a /tmp/rip1/* /tmp/rip2 # umount /tmp/rip1 ; rmdir /tmp/rip1 # mkdir /tmp/rip2/boot/1 # cd /tmp/rip2/boot/1 /tmp/rip2/boot/1# gzip -dc ../rootfs.cgz | cpio -iumdv Make the changes and remove the old system. /tmp/rip2/boot/1# rm ../rootfs.cgz Then cpio/gzip the new system. /tmp/rip2/boot/1# find . | bin/cpio -v -o -H newc | gzip -9 >../rootfs.cgz ^^^ "Use 'bin/cpio' from rootfs, because the version on your system may cause a problem!"