How to install PSU-remastersys:

1. Download from http://ftp.psu.ac.th/pub/psu-remastersys/psu-remastersys.tgz to /tmp of local disk by:
wget http://ftp.psu.ac.th/pub/psu-remastersys/psu-remastersys.tgz -N -P /tmp 

2. Extract files by:
tar -zxvpf /tmp/psu-remastersys.tgz -C /tmp 

3. Get in the created directory by:
cd /tmp/psu-remastersys

4. Install by:
sudo sh install-psu-remastersys.sh

5. All done.