Can I convert my TV to get PAL?

I have a Panasonic Plasma TH-58PX60U which I purchased in the US earlier in this year. I have moved back to Australia unexpectedly, and have run into the obvious issue of PAL/DVB vs NTSC/ATSC. I have spoken to Panasonic Australia and have been told that those TVs sold in Australia (they didn't sell the 58") will actually do PAL and NTSC whereas those from the US only deal with NTSC. This begs the question, is the firmware already in the TV to handle PAL but not activated? So I'm trying to find out if there is a hidden menu or similar, relatively easy and cheap way to allow me to use this TV for PAL on the AV or Component inputs.  Any suggestions?