Copying my customized /home/knoppix in boot time

I use KnoppixKDE 3.1 and customized the GUI. The directory /home/knoppix packs it in a file knx_home.tar. Can I decompress the file to knx_home.tar when beginning knoppixKDE from the CD?

I have seen a file knoppix.sh of home persistent in directory /KNOPPIX of the CD. I can copy my file .tar to the CD in folder /KNOPPIX and the following boot simply to put the command:

"tar - xvf to knx_home.tar /ramdisk/home/knoppix" in script knoppix.sh, or I need to make something additional? :?: