Alright bro, since you have everything figured out with your parents now just make them happy.
You only get one set of parents, love them and do everything you can for them while you live in their house. They may treat you like shit but they still give you a roof to live under, clothes, internet, food, etc.
Just kiss your parents ass til they are loving again, trust me it'll work from past experiences.
As for Aimee on MSN just put "God, my life is so perfect!" or something like that, make it seem like your grateful she's gone and she'll want you back in a heartbeat.
Treat her like shit, don't get lovey dovey, it'll only leave you in shame.
Hope I helped, I'll be watching this thread