How To Make A Fully Customized KDE Live CD/DVD Using Kubuntu - BaseBuild

Hello,
Once again, kudos for the BEST Linux site on the net. I have a quick question regarding the howto, "How To Make A Fully Customized KDE Live CD/DVD Using Kubuntu".

In the following section, I do not understand the "BaseBuild" reference for Synaptic:

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Step Four: Use Synaptic To Install Core Software

Add the following to your sources.list file:

## Remastersys
deb http://www.remastersys.klikit.com/repository/ remastersys/

We need some software installed to handle key factors like sound automount and many other things. The current installation is exremely minimal and would require a great amount of time to go through and individually find all the correct packages needed. So I have used Synaptic to create a recovery file of all the software you need for your core install system.

Click Reload in Synaptic to update the apt sources.

In Synaptic go to File >> Read Markings >> browse to the file BaseBuild that was included in the archive along with this file.

Click Apply.
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Can you tell me what the red line above is referring to?

TIA,
Tom

 

Not sure, but maybe it is referring to the recovery file?