I have been trying the hacks out there for various LG units and other Zenith units, but none of them work. Most of the Zenith hacks I have tried make my player not display video, and the LG hacks I have found do not play VCDs. I am not sure which other Zenith/LG models were on the market at the same time as this one. It is a five-disc changer, and the sticker on the back indicates it was made in September 2000. The PROM display codes work fine. Here is the info from my unit:

MODEL: 5 ZEC 3LANG
REGION: NO.01
NATION: US 00
MICOM: VER1.1 20000816
SERVO: C008
MPEG: 0L40 20APR00
MISCEL: 11 A0
OPTION: 55 53 00 FE 00

This model must not have been very popular, because there are only a couple hits on Google for it, using either "DVC2515" or "DVC-2515" for my search terms. I understand from reading the forums here and www.regionfreedvd.net that Zenith/LG are not very forthcoming with firmware updates, but the command structure seems to be the same today as it was when my machine was made, so hopefully there is a chance I can do VCDs on mine. Anybody have any idea if one of the newer LG firmwares available on the forums here would work on my unit? TIA!