uhm replaying this sounds long, how safe is cheating and adding points? it will probably break some events huh? Is there any safe way to do that ?
Yes, if you over do it you can break the game very easily
What I did, which is how I went about creating my saves (link in the signature), is
Follow the walkthrough to the letter
take each section one at a time
only using the cheat to add money, reset energy to max only and resupplying main inventory
main inventory being, lube, condoms, suntan lotion, Plan B pills, vitamin X, Sleeping Pill, Lactation Pills
But only after I acquire them through playing the game.
As for increasing relationship points, I only increase them after I complete a section of the walkthrough, and only at the level the section tells me they should be at, at that time
For Example
Doing so otherwise, could easily make you miss triggers and thus break the game, forcing you to restart all over again.