spooner: I already congratted you dude on your new TH, but what the heck...how 'bout another one?!?! Good deal! Hope you get years of enjoyment out of it!
As far as a inverter, you'd be fine with a 800watt unt to plug the TV and PS2 into right from the TV outlet. You can also go bigger, but that will require just a little more modification (see 56's mod pics in the sticky Mod thread).
As always, don't forget to have some fun n the thing...life's too short to spend all your time putting lipstick on a farm animal...go enjoy it!!!