creating new lots

I was wondering if anyone knew how to give a newly placed lot an address (either manually, or how to make the game do it). I wanted to place a larger lot where two smaller ones were, and despite it fitting perfectly onto the corner of two streets, no address showed up. (In case anyone wonders, I placed it in SV where the Bunch household and the empty lot next door used to be.) Also, the lot size options in Edit World mode are so limited; is there a way to make a custom-sized grid for placement?

I don't have any special CAW tools, just the Edit Town options that the fully patched game gives me.