The entry point to ANY PGC must be non-seamless, by definition. You can't change it. PgcEdit won't let you change it, either (it's greyed out in the PGC Editor). So, don't sweat on it, just change to a green, if you wish. So, nothing to do for title 4 (VTST 3, 2).
Not sure if title 8, cell 2 was the old LB. Normally, in the absence of angles (which this is not), you can make this seamless without any issues. But, I'd leave it alone.
Remember, in ImgBurn, to select the same cell as in PgcEdit and tick don't update IFO/BUP files.
Regards