For what it's worth, I gave this tweak a try, and I have no experience making mods whatsoever.  I just expanded my Sims' house, so it took a few hours of play time to notice, but lo and behold, finally I saw two toons walk right through each other.  One of them paused momentarily, but there was no foot-tapping or any such thing.  I should mention that I disabled JMP's "crappy XML tweak" first, since for all I know the two tweaks might have conflicted.
Claeric's point is well-taken -- I did save the original .ini file, and will switch the files back with each patch, just like I do with the .exe file that has the no-CD crack.  Actually, it might even be necessary to throw out the tweaked .ini file, put the old one back where it was, patch, 
then store a copy of the .ini file, and THEN make a new tweaked .ini file.
Either way, my game just got about 6.5% more enjoyable.  I think what I'm supposed to say here is BAAAAAH.  

ETA: Don't forget to click the "thanks" button for added lulz!
*clicks "thanks" button*
I have now been edumacated.  
