I still have it and will update the guide in a few days. Honestly I was just overly optimistic that the BDSup2Sub issue wasn't that common or that they'd just fix the darn thing.

Anyway, the first method is kind of a quick and dirty fix by retiming and repositioning the subtitles. It doesn't resize them and if there is positional information it can make a mess of things.

The other way actually involves using a program to batch resize every subpicture and then you rebuild it into a new .sup.

Neither was a great answer... I should go see if I can get the guy working on the program to look at it again.