custom Installer

["Tanco ." <smarkovik@gmail.com>]

Hello guys,
I am working on developing a system that will be a custom distro that I 
will need to
compile as a Installable DVD / Iso Image..
I was thinking of installing on a system and using mondo system backup
to make the iso images, but I don't like it since it will remember my
partitions backup, so it will require a full HDD,
so I need to make a custom installer and I don't intend on typing the 
code for it..

any ideas?