There's a confirmation with it, had to try it didn't I?? Then suddenly realised I REALLY didn't want to do it to my main town after all lol... Players must be at a certain level before it appears to them... I started a new town to try it out but it hadn't appeared by level 7 or 8 so just gave up - its probably level 15 like some other things I'd guess... Tried it on a level 20 feeder town and got asked 3 times if I seriously wanted to store everything, then got a 'final warning'. After pressing this the game went back to the load screen then it loads up with Homer, Lisa and Simpsons house... and the Lemon tree if you have it - all the usual suspects that cant be stored :) I wholeheartedly agree it should have a pass-word/code/phrase on it which should be different from usual login password... 8)