Here is a version of the LotExpander which may resolve the problem that several people are seeing, where the LE crashes after clicking "Start" on the initial introduction screen.

WARNING to everyone:

This is an unsupported TEST version of the LotExpander (1.2.7.5). Use at your own risk. Specifically, this version contains the untested code which allows a lot to be decreased in size.

Here is a link to the current supported version of this tool: http://www.modthesims2.com/showthread.php?p=1747180

To: aelflaed, JillStories, and Mutantbunny

Please let me know whether or not this solves your problems running the LotExpander.

[Update:]
Removed TEST version.