Hey, Chptrk, way to go! The Abandonment Dilapidation Modd (ADM) works!
A few months ago for the hell of it I started playing Sim City 4 again (Rush Hour version) and I remembered that when I played it in the old days (2004?) I was somehow able to place any structure anywhere, using a cheat. I couldn't for the life of me remember how, though. It was definitely not the same cheat method used in this thread. The problem was that after I placed (plopped?) the buildings, and then ran the simulation in Rhino mode or Cheetah mode, the buildings just decayed in a matter of seconds. Now, with this building cheat, plus infinite moolah, and thanks to you and Raphaelninja and the ADM, the buildings don't decay, and I can watch the City's Sims and vehicles do their thing as though I were actually playing Mayor (which I don't do because I don't have the patience nor the inclination).
So, much thanks to you both for a great Modification. EA/Maxis should not have abandoned Sim City 4. IMHO, Sim City Societies was a disaster. I purchased it twice, a year apart, and it didn't work either time. It's obviously time for a Sim Cities 5, but until then, we still have SC4, and now we can create at will and roam at will, no longer confined to Pause Mode, without fear of dilapidation, decay, and decomposition.
Many thanks again. You made my day.