bootcd with udev

Is there any way to get bootcd to work with udev?

mkinitrd doesn't work with udev so I use yaird to create the inird image which
uses cpio and not cramfs.

When I run bootcdwrite I get the following:

exit=32
--- OUTPUT from <mount -o loop /boot/initrd.img-2.6.12-1-386
/var/spool/bootcd/mnt -t cramfs> ---
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

any ideas?