LC630内蔵IDEドライブから起動可能な、BootableCD-RをPCで作成するという
テーマで調べてみたところ、hybrid CDになりますが、
http://www.linuxcommand.org/man_pages/mkisofs8.html
 > -boot-hfs-file driver_file
 >    Installs the driver_file that may make the CD bootable on a Mac-
 >    intosh. See the HFS BOOT DRIVER section below. (Alpha).
 > ...
 > HFS BOOT DRIVER
 >    It may be possible to make the hybrid CD bootable on a Macintosh.
http://fy.chalmers.se/~appro/mkisofs_plus.html
 > Such hybrid disks can optionaly be mastered bootable!

Writing Bootable CD-ROM: Try This At Home
http://www.cdpage.com/Compact_Disc_Variations/bootablecdarticle.htm
不可能ではないようです(検証は行っていません)。
-- 
Shuichi YAMAGAMI, Kyoto, JAPAN
yamags@mbox.kyoto-inet.or.jp