just buy a new sputnik valve and you'll be ready to go
no seriously this is a little comical. Just as 194GVan said, someone else's settings may not work well for you - at least not as well as some of your own settings would. Everyone has a different style, and therefore, everyone demands something a little different from their cars. This is something I've echoed many times before and I wish more people would realize it.
BTW, good post 194GVan.
Have a look at the GT3 drift forum and find some settings for an S15 there. Naturally they will still need a little work to account for the new physics engine. But, I've been having some (limited) success just pulling my old settings out and throwing them at cars in this game. The general tuning 'philosophy' remains the same and settings still affect the car in the same manner, its just the games feel that has changed. Also head to M-specs suspension tuning guide in the GT3 settings forum, its a great resource.
Past that its all about practice and learning to manage the cars weight transfer - this seems infinitely more important in GT4 than it did in GT3.