Sideway Driveway

I saw this neat looking tutorial about using driveways sideways to make on-street parking. I tried it; it means meddling with a portal (a Maxis pavement tile to you and I). But it seems real easy AND people are getting this to work. Me? No, it all went wrong - big time. The driveway turned as it was meant to, I was able to place the vehicle and I built this super lot on the terrain.

But the family wouldn't move in properly (the game simply hung), then the lot was crashing my game, then the neighbourhood it was in was crashing my game. So, bye-bye lot, family, neighbourhood. Bye-bye one and all.

Lesson number 17: back up your neighbourhoods before trying exploits like this! I hope I have learnt it - this time!