You only need resize_sd.sh and install_snapclient.sh
Download both install scripts to a fresh piCore Installation
$ wget https://github.com/bjwelker/Snapcast-piCore/raw/master/install_snapclient.sh
$ wget https://github.com/bjwelker/Snapcast-piCore/raw/master/resize_sd.sh
Make the script executable
$ chmod +x *.sh
Run the SD resize so it´s space enough
$ ./resize_sd.sh
after reboot run
$ sudo resize2fs /dev/mmcblk0p2
Second run
$ ./install_snapclient.sh
After reboot snapclient should play :) To switch betwean HDMI and analog output use
HDMI:
$ amixer cset numid=3 2
Analog:
$ amixer cset numid=3 1
or just connect to the Webinterface on http://SnapCast-Client-IP