Ill just say its probably best to not use the cheat version of this game, or at the very least just have the player maxed out. It seems that having certain girls maxed out from the getgo breaks some of their events where something happens only when you build up to a certain threshold.
Like Light will never give you her home address for you to visit at your convenience unless you build up her friendliness to you. If its maxed out from the getgo, the event never triggers and you can only meet her at the park.
Likewise, I'd avoid freezing time and spamming compliments or something as that can build someone up too fast. Maybe Drew knows exactly who is effected by these types of things and can say who can be safely maxed out from the getgo and who needs to be grinded out the old fashion way.