Hello We are currently checksuming all files inside $archisobasedir (aitab, *sfs, kernel/initramfs and boot/syslinux related files) this is stored in one file only. Its works good for now, but I think we only need to checksum only aitab and *.sfs if they are needed. Currently if you boot a dual-iso in i686, you are also checksuming *.sfs for x86_64. Not a big issue, this just take a bit more time. The real issue is when booting via PXE with HTTP/FTP methods, since they download only aitab and only needed *.sfs files, so you can not use directly the only one file where checksums are stored. My proposition is: (1) Do not checksum syslinux related files, anyway you are already reach initramfs stage. (2) Do not checksum kernel/initramfs files, for the same as (1) (3) Two options here in how to make checksums: (3.1) Two checksum.${arch}.md5 for each i686 and x86_64 for only aitab and *.sfs (I like this, is much more simple to implement) (3.2) One checksum for each *.sfs and aitab placed in the same directory where such file reside, (i.e /arch/boot/i686/root-image.fs.sfs.md5) Opinions? Thanks. -- Gerardo Exequiel Pozzi \cos^2\alpha + \sin^2\alpha = 1