found a way to have the correct bin,
I put the image with the multiboot and updated the rar file via the web
once downloaded in the multiboot folder it extracts it as the hd51 folder and by magic it uploads the bin * kernel + rootfs.tar file,
once I make the backup I change the wrong file linuxke.bin with the uppato bin * kernel which with my done by BackupSuite restores the complete image to me.