[Fedora-livecd-list] kernel 'make rpm', kadischi and kernel version disconnect

I'm building a kernel rpm which then I'm trying to build a livecd with for testing purposes. In my case I've edited the kernel Makefile setting EXTRAVERSION = _1.2185.2.1_FC6.lspp.21, I used '_' instead of '-' because of rpmbuild doesn't like '-'. I build the rpm and then copy kernel-2.6.16_1.2185.2.1_FC6.lspp.21-1.rpm to /tmp/fc5/Fedora/RPMS and run createrepo followed by 'kadischi /tmp/fc5 /tmp/fedora-live.iso'. When kadischi get to the point of running initrd the following happens: making initrd image /tmp/livecd-build_no28/system/lib/modules/2.6.16_1.2185.2.1_FC6.lspp.21-1 is not a directory. *** Fatal error: /usr/local/share/kadischi/livecd-mkinitrd.sh returned non zero (256) exit code. Aborting execution. There is a /tmp/livecd-build_no28/system/lib/modules/2.6.16_1.2185.2.1_FC6.lspp.21 directory. I see that there is a disconnect related to the release number (-1) between the kernel rpm build and kadischi but it's unclear where to fix this in the kernel build or kadischi.