Omer Faruk Sen has maintains VoIPong LiveCD! based on FreeSBIE project. LiveCD is an ISO image which can be burnt into a blank CD directly, and includes pre-installed VoIPong release along with several boot-time scripts for configuring the OS and VoIPong.
Please find the gzip'ed ISO images here:
Version 2.0 MD5: 2458d372b0113771eb642987ce0b2f43