live-helper configure syslinux

[Robert Spiteri <rspiteri01@gmail.com>]

I am building a Debian Live ISO and need to do the following:

1. 
disable the syslinux splash (which by default displays the Debian Live 
logo). i just want plain text and no graphical splash
2. modify the syslinux config file to customize the menu

Which 
files should be modified/added in the config directory before building 
the ISO?

Robert