[GTALUG] How to unpack/repack Debian initrd.img?

(It's double posted.  So, reply to your mailing list). :-) How do I * *unpack* an existing /boot/initrd.img-x.y.z  (Debian) * *repack* back. Of course, I need to do some work in between... hence, the question. To unpack, I can use 'unmkinitramfs'. But, I can't seem to repack an initrd from *current* directory.  'mkinitramfs' always takes stuffs from my system directory (/lib/modules/x.y.z/).  Current directory has many add-ons from the original initrd, that I don't have, so I don't want to lose it.     mkinitramfs -v -r ./ -o ~/new_initrd.img x.y.z According to manpage, "-r ./" should force the root directory as current directory, but it doesn't seem to.