I implemented the changes from neroden also in standard. Most importantly, I added a parameter to the cityrules.tab, cluster_factor. This is very much pakset dependent. If you use distribution weights of 100 and 10 for clustering buildings (to have only few isolated ones) you want to use values of 100.
Oviously it needs a new build of makeobj.
Looking forward to using this in pak128.Britain. Thanks for implementing - although it will be a while before I change this as I'm concentrating on vehicle balance at the minute...
You can have a look at the implementation in Experimental (look at Neroden's modifications to it, too) - it should be already configured there, and can just be copied.