Reading your mail at [1] WRT problems of makefs and makeisofs 
compatibility, maybe have a look at the -current installboot(8) manpage 
which gives an example of making a bootable CD.

Also, have a look at my attempt to revamb the boot-media framework at [2].


  - Hubert


[1] http://mail-index.netbsd.org/current-users/2006/02/03/0038.html
[2] http://mail-index.netbsd.org/tech-install/2006/02/17/0000.html