Here is the utility for making squashfs images. Compresses
Title: squashfs-tools.tce
Description: Compressed read-only file system tools.
Version: 3.4
Author: Phillip Lougher
Original-site: http://squashfs.sourceforge.net/
Copying-policy: GPL
Size: 68K
Extension_by: Jason W
Comments: This extension contains mksquashfs and unsquashfs.
It uses zlib, no LZMA support is included.
To make a squashfs image of a directory:
# mksquashfs directory/ filename.extensionname
This extension is PPI compatible.
Change-log: ----
Current: 2009/03/18 First version.