Well, now I have a new goal. Some stuff just will not lean. One fine example is the Jointed Rail's P32s in Amtrak livery. I'll continue testing more items, I see some freight will not lean either, but I will relay what later.
Okay, so from what I have seen, most locomotives I've tried do not lean in curves with banking rules script, even at 0.75 setting. Also, some other rolling stock will not lean. So, I don't know if there is anything else to set, or look for to ensure it will work on certain train vehicles (locos and rolling stock/passenger cars)??? Oh well...
I tried both the suggested banking item, and the one I found already on my system...
Banking consists,<kuid2:82445:90003:3>
Banking consists RUS,<kuid:539196:100149>
both have the same thumbnail...