Bootdisk modules.cgz

["A.J. Werkman" <werkman digifarma nl>]

I want to extend my bootdisk for installing linux with a driver for my NIC.

I opened the modules.cgz:
cd Modules; gzip -dc ../modules.cgz | cpio -idumv

I put the nic module in the resulting directory. Then compresed it again:
cd Modules; find . | cpio -ov > ../modules; gzip -9 ../modules; mv 
../modules.gz modules.cgz

After putting the resulting modules.cgz back in initrd.img and starting the 
install I get an error:
error 2 reading header: cpio: Bad magic.

Can anyone point me to where I went wrong??

Koos.