How to create bootable iso image from existing fedora system?

[lakshmi pathi]

For weeks now (with a help of google),I'm trying to create bootable
iso image from existing fedora system. Still not getting it right.
I want to creat it from scratch from command line, say using mkisofs
and syslinux .(don't want to use UI)
did you tried this before?Any urls?Any help?

If this is not the correct forum,please ignore this mail.

-- 
Cheers,
Lakshmipathi.G
www.giis.co.in