At first, to generate a custom distribution, it is required to create a 
customization profile structure like below. The voyage-build.sh script 
understands this profile structure to build the customization distro.

voyage-myproj/               
  |-- conf/
  |     |-- apt.conf    # defines multiple apt repository and packages to add
  |     |-- dpkg-i.lst  # defines a list of deb packages to be downloaded and 
  |     |					installed using "wget" and "dpkg -i" 
  |     |-- dpkg-r.lst  # defines a list of deb packages to be removed using 
  |     |					"dpkg -r" 
  |     |-- kernel.conf # defines the kernel deb, kernel module debs and 
  |     |					additional modules.
  |     |-- rm.lst      # defines a list of files or directories to be removed 
  |		|					in the target distro.
  |     `-- tmpfs.lst   # defines a list of files to be symbolic linked to 
  |  						ramdisk (i.e. defines /ro and /rw files)
  |-- etc/              # directory contains files that may be useful to 
  |							scripts/pre.d or scripts/post.d
  |-- overlay_fs/       # defines the file systems that to be overlayed to the 
  |		|					existing voyage file systems, 
  |     |               # you should put any binaries and other custom 
  |		|					configuration files here
  |     |-- etc/
  |     `-- usr/
  `-- scripts/
        |--pre.d/       # a set of scripts executed by run-parts before 
        |					customization process begins
        `--post.d/      # a set of scripts executed by 
        					run-parts before customization process ends

voyage-custom.sh syntax:

voyage-custom.sh <voyage distro dir> <customize profile dir> [distro target directory]

For example,

voyage-custom.sh <somewhere>/voyage-0.2pre1 <somewhere>/myproj

This will generate the customization distro called voyage-myproj in the current directory