Bemásolom a lényeget:
„What you need to do first:

1.) Go to the Cygwin website and download the „Setup.exe” file, then double click on it which will open the Cygwin setup window. Normally all default settings should be fine, you just have to select a mirror that is closest to your location. When it comes to the program software install options, just go with the default, apart from one section and that is the section Libs, see picture

At the bottom of the Libs section select the zlib package, as you need this.

Any depending packages will be selected automatically. Now sit back and let the program fetch those files, install them and set them up. For future reference I assume that you have choosen the default installation, if you have not then you have to adjust the path I mention accordingly.

2.) Now download and unrar the squashfs.rar and copy the two *.exe files into C:cygwinbin. Now start Cygwin and type „mksquashfs -version” at the command prompt and you should see some info like mksquashfs version 2.1. Now type „unsquashfs -v” and again you should see some info about it. Well, you are ready to go now!

3.) You will need SBF Recalc 1.2.8 to split and repack firmware.

Optional software, but highly recommended
4.) You might want the FlexBit-Editor if you want to edit the CG43
5.) You might want the Iconres-Tool V1.0 if you want to edit the iconres.ezx in the CG52

Steps:
Let’s get started by unsquashing a CG52.smg (works the same with CG43.smg). You have to use SBF Recalc 1.2.8 to split a firmware first in order to get the CG52.smg, but usually those file names are far too long to type them into the command prompt, so we just shorten the name to simply CG52.smg and copy this file to C:cygwinusrlocal. Now create a folder called test in C:cygwinusrlocal, so it looks like C:cygwinusrlocaltest, next type the following command

unsquashfs -d /usr/local/test -f /usr/local/CG52.smg.

Here is a explanation of the code: -d gives the destination folder (this is a must do, otherwise it will create a „squash-root” folder in your current location, which would be the /home directory), -f forces to write/overwrite existing files and folders that might be already in the text folder (this is optional, so it is up to you if you want to use -f), /usr/local/CG52.smg is the location and the name of the CG52.smg file which should be unsquashed.

Now create a CG52 folder in C:cygwinusrlocal and copy the whole content of C:cygwinusrlocaltest into C:cygwinusrlocalCG52 or use one of the already „unsquashed” CG’s from the table at the bottom. Now you can edit it to your liking and when done then type the following command”

Eddig kéne eljutnom, de valami nem oké. Squafs 4.0-ás, a Cygwint meg a honlapról szedtem, az a legújabb verzió.