Unzipping the file turns into a fodler or more zip/rar files.

You have these files right:

Gec Living.part1.rar
Gec Living.part2.rar
Gec Living.part3.rar
etc.

you unzip/unrar it and you get this:

Gec Living 001.zip
Gec Living 002.zip
Gec Living 003.zip
Gec Living 004.zip
Gec Living 00*.zip
...... etc.

But there is no .exe or any dos programs to compile or uncompress all the zip files. What you should do now is select all the Gec Living 00X.zip files and then extract all the contents of each zip file into the same folder, do not use the option to unzip all the zip files into separate folders, dividing/splitting the contents of all the zip files will make it hard to combine all the files together.

I use IZArc, here are the steps:

Select one of the 3 files, and then extract (for example):

Gec Living.part1.rar
Gec Living.part2.rar
Gec Living.part3.rar

Now, select all and extract here (for example):

Gec Living 001.zip
Gec Living 002.zip
Gec Living 003.zip
Gec Living 004.zip
Gec Living 00*.zip
...... etc.

You should now have your files. this is an example though so it might not work for all cases but this is just one known way that people use to compress files.

Other simpler cases might be as easy as unzipping the 3 parts of the rar file, and then running an .exe or dos command program to uncompress the Gec Living 00X.zip files and re-create the desired contents of the rar file.